Wyniki wyszukiwania - BazTech

1

Optical-graphic studies of hydrogen additives’ effects on diesel fuel atomization parameters

Shalapko Denys

Transport Problems

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2023

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T. 18, z. 4

135--146

EN

This paper considers a promising method of enhancing the effectiveness of diesel engines. This method uses the addition of hydrogen in a small amount (up to 2% by mass). The hydrogen additive is added to the high-pressure fuel line before the injector. Based on the experimental findings, a reduction in the engine’s specific fuel consumption of up to 3% was achieved in comparison to the baseline configuration. A research study was conducted at the Admiral Makarov National University of Shipbuilding using a newly established experimental setup to assess the impact of hydrogen additives on primary fuel delivery, spray characteristics, and overall engine performance. Among the experiments conducted, one investigated fuel atomization parameters, focusing on how the presence of hydrogen in the fuel influenced the fuel jet’s characteristics. A high-speed camera with a high resolution was used to record the optical-graphic study to isolate and extract individual shots of the torch’s expansion, thus obtaining images devoid of ignition and flickering. After conducting image processing and constructing jet models, along with subsequent analysis, it becomes apparent that the addition of hydrogen to the primary fuel results in an enhancement of spray quality. The torch volume expanded by approximately 10% to 15%, while the jet length diminished by approximately 8% to 10%. Consequently, the average diameter of the atomized fuel droplets decreases by up to 10%, with the extent of reduction contingent upon the initial parameters and configurations.

2

High quality multi-zone and 3d CFD model of combustion in marine diesel engine cylinder

Cuper-Przybylska Dominika, Nguyen Van Nhanh, Cao Dao Nam, Kowalski Jerzy

Polish Maritime Research

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2023

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nr 2

61--67

EN

The paper presents a 3D model of the processes taking place in the cylinder of a large 4-stroke marine engine. The model is based on CFD calculations performed on the moving mesh. The modelling range includes the full duty cycle (720° crankshaft position) and the complete geometry of the cylinder with inlet and exhaust ducts. The input data, boundary conditions and validation data were obtained by direct measurements on the real object. Fuel injection characteristics were obtained by Mie scattering measurements in a fixed-volume chamber. The modelling results have been validated in terms of the pressure characteristics of the engine’s cylinder within the entire range of its loads. The mean error did not exceed 1.42% for the maximum combustion pressure and 1.13% for the MIP (Mean Indicated Pressure). The model was also positively validated in terms of the O2 and NOx content of the exhaust gas. The mean error in this case was 1.2% for NOx fractions in the exhaust gas and 0.4% for O2 fractions. The complete model data has been made available in the research data repository on an open access basis.

3

Research on the impact of various coating types on parts wear of certain injection pump elements

Bałon Paweł, Rejman Edward, Smusz Robert, Kiełbasa Bartłomiej

Mechanik

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2023

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R. 96, nr 1

44--47

EN

The geometric structure of mating surfaces has a crucial influence on the friction and resulting wear processes. This is particularly important in the case of injection pumps, where ensuring appropriate surface quality and tightness in a long-term operation process is extremely important in order to maintain nominal operating parameters. It is extremely important during variable pump operation conditions, start-up and shutdown, when there is a significant deterioration of cooperative conditions resulting from insufficient lubrication of the mating surfaces. The contact pressures on the mating surfaces are increasing and they are in contact with each, causing significant wear and high movement resistance. The technology of the application of special coatings is used in industrial scenarios for the deposition of thin layers to modify the surface layer in order to improve tribological properties, increase abrasive wear resistance, and improve the visual quality of the surface. The authors compared the current possibilities of the technique (ceramic coatings) with the commonly known methods for strengthening the cooperative surface (phosphating). As part of the work, several potentially applicable types of protective coatings were tested.

PL

Struktura geometryczna powierzchni współpracujących wywiera kluczowy wpływ na procesy tarcia i zużycia. Jest to istotne w przypadku pomp wtryskowych, w których zapewnienie odpowiedniej jakości powierzchni oraz szczelności w długotrwałym procesie eksploatacji jest niezwykle ważne dla utrzymania nominalnych parametrów pracy. Ma to ogromne znaczenie podczas zmiennych warunków pracy pompy, rozruchu i zatrzymania, gdy występuje znaczne pogorszenie warunków współpracy wynikające z niedostatecznego smarowania powierzchni współpracujących. Zwiększają się naciski kontaktowe na powierzchnie współpracujące, które stykają się ze sobą, powodując znaczne zużycie i duże opory ruchu. Jednym ze sposobów zmniejszenia zużycia współpracujących elementów jest nałożenie powłok. Technologia nakładania specjalnych powłok jest stosowana w warunkach przemysłowych do osadzania cienkich warstw w celu modyfikacji warstwy wierzchniej, aby poprawić właściwości tribologiczne, zwiększyć odporność na zużycie cierne i polepszyć wizualnie jakość powierzchni. Autorzy porównali obecne możliwości techniki (powłoki ceramiczne) z powszechnie stosowanymi metodami wzmacniania powierzchni współpracy (fosforanowanie). Przetestowano kilka możliwych do aplikacji rodzajów powłok ochronnych.

4

Analysis of potential improvements in the performance of solenoid injectors in diesel engines

Vrublevskyi Oleksandr, Wierzbicki Sławomir

Eksploatacja i Niezawodność

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2023

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Vol. 25, no. 3

art. no. 166493

EN

Efficient fuel injection and exhaust gas cleaning systems are needed to promote the development of high-performance internal combustion systems and decrease greenhouse gas emissions. Electronically controlled injection systems enable nearly unlimited control over system components whose operation is limited by the inertia of moving parts and other physical phenomena. In the present study, a novel technology for manufacturing magnetic cores was proposed to improve the performance of solenoid injectors in Diesel engines. The conducted simulations and experiments revealed that the developed technology can increase the speed of solenoid injectors. In the proposed solution, the fuel dose was split to effectively control the injection process and improve engine performance.

5

Preliminary tests of a Diesel engine powered by diesel and hydrogen

Longwic Rafał, Tatarynow Dawid, Kuszneruk Michał, Woźniak-Borawska Gracjana

Combustion Engines

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2023

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R. 62, nr 4

35--39

EN

This article discusses the possibilities of powering a commonly used diesel engine with renewable fuels. It analyses scientific studies that clearly indicate that the use of hydrogen is a potentially future-proof option due to its potential to reduce specific fuel consumption and improve performance and increase thermal efficiency. The research was carried out on a laboratory bench designed to test a diesel engine fueled by different fuels. A proprietary hydrogen injection system with dedicated control software was used. Hydrogen injection pressures of 0.15, 0.18, 0.20 MPa and hydrogen injector opening times of 2.5, 3.0, 3.5 ms, respectively, were set as control parameters. The rapidly varying engine operating parameters were recorded and the parameters calculated from them were analysed.

6

Investigation of processes in the WLTC test of a passenger car with a diesel engine

Andrych-Zalewska Monika

Combustion Engines

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2023

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R. 62, nr 3

52--62

EN

The test results and their analysis was discussed in this article. The tests were carried out in accordance with the WLTP (Worldwide Light Duty Test Procedure), on a passenger car with a compression ignition engine. The analysis was conducted doe the following variables: vehicle speed, exhaust emission rate and fuel consumption volumetric rate. The subject of the research are exhaust emission components that are harmful to the health of living organisms: carbon monoxide, hydrocarbons and nitrogen oxides, as well as greenhouse gases. The research results have shown a very large range of values for carbon monoxide, organic compounds and nitrogen oxides emission rate characteristics. The average distance-specific emissions values of carbon monoxide, organic compounds and nitrogen oxides were very small and were in line with the Euro 6 requirements within a large margin. Correlation studies of the measured variables were conducted - between vehicle speed and exhaust emission rate as well as volumetric fuel consumption rates, and between exhaust emission rates and volumetric fuel consumption rates. The correlation studies have shown that the highest coefficient of determination in relation to vehicle speed was found for volumetric fuel consumption and carbon dioxide emission rate, and the weakest correlation for carbon monoxide emission rate and nitrogen oxides emission rate. The correlation between the rate of volumetric fuel consumption and carbon dioxide emission, as well as for hydrocarbon emission and methane emission rates, was found to be the strongest. The carbon monoxide emission rate was the least correlated with all the other measured variables. Dimensionless statistical characteristics of the measured variables were determined, such as: extreme values, range, mean value, median, standard deviation, kurtosis, skewness and coefficient of variation. For all of them, the mean value was much greater than the median, and the standard deviation was greater still, than both of those values. The numerical distributions for the values of exhaust emission rate and volumetric fuel consumption turned out to be leptokurtic and have right-sided asymmetry. The coefficient of variation analysis made it possible to assess that the most dynamic properties could be observed in organic compounds emission rate, followed by carbon monoxide and nitrogen oxides emission rates, and finally - the vehicle speed. Histograms of the examined processes were determined. The vehicle speed histogram was characterized by relative uniformity apart from the dominance of the idle speed. Histograms of exhaust emission rate variables were most frequently dominated by small values. The zero values occurred less frequently for the fuel consumption volumetric rate histogram. Based on the conducted research and the obtained data, a set of conclusions was drawn.

7

Effect of DMC blend ratio on emission characteristics for diesel engine generator fueled with DMC/diesel blend fuel

Kawakami Tadashige, Liu Jinru, Jin Meiling, Eto Kuniyoshi

Combustion Engines

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2023

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R. 62, nr 4

23--27

EN

In this study, the DMC/diesel blend with 5%, 10%, 15% DMC by volume are prepared to investigate the emission characteristics. Since the combustion process is strongly influenced by the addition of low boiling point DMC boosts the atomization and liquid fuel mixture, the emissions of hydrocarbons and particulate matter are significantly reduced by the DMC addiction especially on the high-load conditions. Also, the nitrogen oxide emission has reduction on the high-load conditions. The scope for balancing NOx and HC emissions exists.

8

Analysis of lubricating oil degradation and its influence on brake specific fuel consumption of a light-duty compression-ignition engine running a durability cycle on a test stand

Sala Rafał, Węglarz Kamil, Suchecki Andrzej

Combustion Engines

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2023

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R. 62, nr 4

109--115

EN

The Euro 6 emission standard requires compliance with tough legal exhaust emissions limits for newly registered vehicles and obligates light-duty vehicle manufacturers to respect the 160,000 km durability requirements for in-service conformity. Although there is no legal limit set for fuel consumption, manufacturers are obligated to decrease the carbon footprint of vehicle fleets in order to obtain carbon neutral mobility beyond 2035. The aim of this paper is to analyse the impact of various oils’ and viscosity grades’ degradation on the change in break specific fuel consumption (BSFC) measured over a standardized durability test cycle. Each oil candidate underwent 300 h of durability test running performed on a test bed without any oil changes. The purpose of the laboratory test was to reproduce the worst-case operating conditions and degradation process of the long-life engine oil type that can be experienced during extreme real life driving of a vehicle. In order to define the influence of the engine oil deterioration on the BSFC profile, the engine operation parameters were continually monitored throughout the test run. Additionally, chemical analysis of the oil was performed and the solid deposits formed on the turbocharger’s compressor side were evaluated. The test results revealed differences up to 5% in the BSFC values between the oil candidates tested over the durability cycle. The observed BSFC increase was directly related to the decrease in engine efficiency and can cause higher fuel consumption of the engine, which in turn has an adverse effect on environmental protection goals.

9

Performance Comparison of Four-Stroke Diesel Engine Fuelled by Various Biodiesel Blends and Diesel

As’ad Samer, Alsaqoor Sameh, Al-Busoul Mamdoh Abdel Alaziz, Abu-Zaid M., Joka-Yilidz Magdalena, Borowski Gabriel, Al-Khawaldeh Mustafa Awwad

Advances in Science and Technology. Research Journal

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2023

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Vol. 17, no 4

46--52

EN

The objective of this study is to compare the performance of diesel engines, fuelled with biofuel blends extracted from corn, sunflower, and palm oils, against pure diesel. The experiments were performed using Lister LVI, single-cylinder, direct injection, four-stroke engines, with a compression ratio of 17:1. The following parameters were analysed: brake torque, brake mean effective pressure (BMEP), brake specific fuel consumption (BSFC), brake thermal efficiency (BTE), and exhaust gas temperature (EGT). The findings indicate that the characteristics of biodiesels are close to diesel fuel. Therefore, biodiesel becomes a viable alternative to diesel fuel without any modifications. Pure diesel has higher brake thermal efficiency and lower BSFC than all the biodiesel blends tested in this study. In addition, the engine consumes less fuel for biodiesel blends than pure diesel. High exhaust temperatures are conducive to nitrogen oxides (NOx) generation; hence, this study reveals that the exhaust temperature is reduced when utilizing biodiesel compared to pure diesel. According to several tests, palm biodiesel provides greater torque and BMEP than the rest of the biodiesel blends, and pure diesel due to emitting less NOx. Therefore, it stands to reason that it would be utilized in a diesel engine.

10

Utilization of waste heat energy of the exhaust gases in a diesel engine using the ORC system

Buczek Łukasz, Samoilenko Dmytro

Transport Samochodowy

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2022

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z. 2

3--9

EN

Waste heat recovery systems using the organic Rankine cycle (ORC systems) can be a way to increase the overall efficiency of internal combustion engines (ICE) and way to reduce the emission to the environment. The main two advantages of ORC systems are: the use of thermal energy, which is dissipated into the environment in the form of heat - fuel energy, which is not used by the ICE and the lack of interference in the operation of the ICE. Additionally, high efficiency, low construction costs and high compatibility and flexibility of ORC systems mean that their installation on ICE exhaust systems is economically justified and simple. The article below proves the legitimacy of considering the above-mentioned solution, proposes an ORC system concept for a laboratory ICE, presents a diagram of the procedure during the design/construction of the system and presents the initial energy balance of the solution.

PL

Układy utylizacji energii cieplnej wykorzystujące organiczny obieg Rankine’a (układu ORC) mogą być sposobem na zwiększanie ogólnej sprawności silników spalinowych (SS), a więc jednocześnie na zmniejszanie emisji związków szkodliwych do środowiska. Głównymi dwiema zaletami układów ORC są: wykorzystywanie energii cieplnej, która jest rozpraszana do środowiska w postaci ciepła, a więc energii paliwa, która nie jest wykorzystywana przez SS oraz brak ingerencji w pracę SS. Dodatkowo, wysoka sprawność, niskie koszty budowy oraz wysoka kompatybilność i elastyczność układów ORC powodują, iż ich zabudowa na układach wylotowych SS jest ekonomicznie uzasadniona i prosta. W poniższym artykule dowiedziono zasadności podjęcia rozważań dot. w/w rozwiązania, zaproponowano koncepcję układu ORC dla laboratoryjnego SS, przedstawiono schemat postępowania podczas projektowania/budowy układu oraz przedstawiono wstępny bilans energetyczny rozwiązania.

11

Badanie poziomu węgla elementarnego jako głównego wskaźnika narażenia zawodowego pracowników na spaliny silników Diesla

Szewczyńska Małgorzata, Pośniak Małgorzata, Kowalska Joanna

Przemysł Chemiczny

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2022

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T. 101, nr 2

117--121

PL

Przedstawiono wybrane zagadnienia związane z oznaczaniem węgla elementarnego w próbkach powietrza. Omówiono metody oznaczania różnych form węgla, ze szczególnym uwzględnieniem analizy termooptycznej. Przedstawiono wyniki wstępnych badań węgla elementarnego w powietrzu na stanowiskach pracy, gdzie emitowane są spaliny z silników Diesla.

EN

The content of elemental, org. and total C in samples of air taken from workplaces exposed to diesel exhaust emissions (tunnel, underground garage, car service, power generators) was detd. using a thermooptical analyzer with a flame ionization detector in the NIOSH temp. program. The highest concn. of EC (13.67 μg/m3) was detd. among employees operating a power generator.

12

Innovative technology for inertization of goaf in operating longwall panel – presentation of gained experience

Lasek Marian, Czarnecki Zbigniew, Jakubów Antoni

Mining Machines

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2022

|

vol. 40, iss. 2

81--87

EN

The article presents an innovative technology of fire prevention in goaves, based on injection of nitrogen and carbon dioxide inert gases mixture from treatment of exhaust gases from a methane combusting gas engine. The developed innovative technology and the constructed prototype of the installation producing inert gases are the final result of the research project entitled "Innovative and effective technology of inerting the goaf active or dammed longwall in an underground mining plant, extracting hard coal, using mixtures of inert gases obtained from the purification of exhaust gases from a gas engine and preventing the formation of endogenous fires", co-financed by the National Center for Research and Development (NCBR). The prototype installation was demonstrated in real conditions at the “Borynia” part of "Borynia-Zofiówka" mine, where, at the end of the research project, the prototype and the developed fire prevention technology with the use of gas engine exhaust gases were optimized and validated. Until now, under normal conditions in a hard coal mine, the fumes generated as a result of methane combustion in gas engines were emitted directly to the atmosphere. Innovative inerting technology, processing and reusing the exhaust gases produced by methane-fueled gas engines, in ecological context will contribute to the reduction of pollutant emissions in the mining sector, and, with mixing at the same time the carbon dioxide and nitrogen in the proper ratio in the mixture, it will fully utilize the advantages of each of these gases, as known when used in separate form. As a result, considering the possibility of generating a much higher amount of inert gases per time unit compared to the available technologies, and combining the physicochemical properties of nitrogen and carbon dioxide in one mixture, the innovative technological solution significantly increases the effectiveness of fire prevention, thus reducing the possibility of an endogenous fire.

13

Operational tests of a distributor injection pump

Bałon Paweł, Rejman Edward, Smusz Robert, Kiełbasa Bartłomiej

Mechanik

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2022

|

R. 95, nr 11

42--46

EN

Research on drive units confirms that, as a result of many years of operation, the fastest-wearing components in diesel engines of machines and vehicles are in-line and distributor pumps. The durability of the pumps is several times shorter than that of the motors. A dozen or so different sizes and types of in-line injection pumps were used in diesel engines of vehicles, which significantly complicated the service capacity. The authors of the work created a pump that has a universal application and can be used interchangeably for many types of diesel engines and also meets the increased durability requirements. The analysis partially presents the results of operational tests of the pump working under load and the analysis of the causes of damage. Model studies of the contact stresses between damaged elements were also carried out.

PL

Badania zespołów napędowych potwierdzają, że do najszybciej zużywających się w wyniku wieloletniej eksploatacji podzespołów w silnikach wysokoprężnych maszyn i pojazdów należą pompy wtryskowe rzędowe i rozdzielaczowe. Trwałość pomp jest kilkakrotnie mniejsza od trwałości silników. W silnikach wysokoprężnych pojazdów stosowano kilkanaście różnych wielkości i rodzajów pomp wtryskowych rzędowych, co znacznie komplikowało możliwości serwisowe. Autorzy pracy skonstruowali pompę, która ma uniwersalne zastosowanie i może być montowana zamiennie w wielu typach silników wysokoprężnych, ponadto spełnia podwyższone wymogi trwałości. W analizie przedstawiono wyniki badań eksploatacyjnych pompy pracującej pod obciążeniem i przyczyny uszkodzeń. Przeprowadzono również badania modelowe naprężeń kontaktowych między elementami, które uległy uszkodzeniu.

14

Effect of biodiesel blended fuel on the performance and emission characteristics of diesel engines – a review

Zheng Fangyuan, Cho Haeng Muk, Xu Changchun

International Journal of Applied Mechanics and Engineering

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2022

|

Vol. 27, no. 1

215--231

EN

The internal combustion engine plays a vital role in transportation, industry, and shipping. However, diesel as one of the main fuels for internal combustion engines, caused many environmental and human health problems. In order to solve the problems, more researchers have been committed to the research of alternative fuels. Biodiesel is a renewable, sustainable alternative fuel, and its characteristics are similar to traditional diesel. It can be mixed with pure diesel. It has been found that a mix with pure diesel in a certain ratio can effectively reduce the negative effects caused by its characteristics, improve the combustion performance, and reduce the NOx and PM emissions. This article mainly reviews the effects of the mixture of biodiesel and diesel on engine combustion characteristics and exhaust emissions, including three parts: part (1) summarizes and analyzes the biodiesel’s production and characteristics, part (2) analyzes the engine’s performance under different working conditions, and part (3) studies and analyzes the exhaust emission under different working conditions.

15

The comparative analysis of catalytic properties of Group 11 elements in NOx reduction by hydrocarbons in the presence of oxygen

Kruczyński Stanisław W., Orliński Piotr, Ślęzak Marcin

Eksploatacja i Niezawodność

|

2022

|

Vol. 24, no. 1

170--176

EN

NOx emission reduction in diesel engines can be achieved by using catalytic reactors reducing nitrogen oxides, including NH3-SCR and possibly also HC-SCR reactors. Reactors using ammonia achieve large conversion rates but cause a lot of operational problems. For this reason, the interest in reactors using hydrocarbons and their derivatives to reduce NOx has increased. Such reactors are the ones using metals from Group 11 (coinage metals) such as Cu, Ag and Au placed on an Al2O3-SiO2 carrier as active materials. The article characterizes the porosity and acidity of the carrier surface. Conversion of NO2, NO and propene as well as the formation of CO and N2O depending on the temperature at constant dosing of propene on a carrier covered with Cu, Ag and Au with a metal content of 4 g/dm3 were evaluated. The results of the tests showed that the tested Group 11 elements can be the basis for further experiments related to the development of this exhaust fumes cleaning technology for diesel engines.

16

Model tests of a marine diesel engine powered by a fuel-alcohol mixture

Zacharewicz Marcin, Kniaziewicz Tomasz

Combustion Engines

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2022

|

R. 61, nr 2

83--88

EN

The paper presents the results of model and empirical tests conducted for a marine diesel engine fueled by a blend of n-butanol and diesel oil. The research were aimed at assessing the usefulness of the proprietary diesel engine model in conducting research on marine engines powered by alternative fuels to fossil fuels. The authors defined the measures of adequacy. On their basis, they assessed the adequacy of the mathematical model used. The analysis of the results of the conducted research showed that the developed mathematical model is sufficiently adequate. Therefore, both the mathematical model and the computer program based on it will be used in further work on supplying marine engines with mixtures of diesel oil and biocomponents.

17

Experimental investigation biodiesel-n-butanol fuels blends on performance and emissions in the diesel engine

Labeckas Gvidonas, Slavinskas Stasys, Mickevičius Tomas

Combustion Engines

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2022

|

R. 61, nr 1

90--95

EN

The paper presents the experimental test results reflecting the comparative changes in the performance efficiency and emissions of the exhaust of a naturally aspirated, four-stroke, single-cylinder, air-cooled diesel engine due to its transition from neat rapeseed oil biodiesel to fuel blends prepared by mixing in various proportion (by volume) rapeseed methyl ester (B) and butanol (Bu). The lubricity properties of biodiesel-n-butanol fuel blends were studied using HFRR method. In contrast to previous works, the undertaken investigation is performed with a totally renewable, binary liquid biofuel blends. The purpose of the research is to reduce simultaneously the production of NOx emissions and the exhaust smoke with respect to neat biodiesel due to potentially improved homogeneity of combustible mixture and particulate matter emissions benefits suggested by the higher oxygen content (21.62 wt%) and the relatively lower carbon-to-hydrogen ratio (4.8) of the normal n-butanol. The tests revealed that the brake specific fuel consumption for the binary biodiesel-n-butanol fuel blends is always higher than that neat biodiesel produces under the same loading conditions. Maximum nitrogen oxide (NOx) emissions were obtained with the engine running on neat biodiesel (2290 ppm). At full (100%) load conditions, the lowest NOx emission was obtained with the engine running on a biofuel BBu20 blend. The lowest level of carbon monoxide emissions (CO) was observed, when engine running with the most butanol-oxygenated biofuel blend BBu20.The highest smoke opacity of the exhaust was obtained when the engine was fuelled with neat biodiesel and at full load.

18

FEM Simulation of Different Engine Mount Models in an Aircraft Piston Diesel Engine

Magryta Paweł, Pietrykowski Konrad, Borowiec Piotr

Advances in Science and Technology. Research Journal

|

2022

|

Vol. 16, no 5

230--241

EN

The article presents the results of numerical simulations using the FEM (Finite Element Method) of the engine mount strength for mounting an aircraft diesel engine with opposite pistons called PZL-100. Four versions of the mount prepared by aircraft engine producer WSK "PZL-Kalisz" company were analyzed. Tests were performed in Catia v5 software in the Generative Structure Analysis module. The boundary conditions were engine gravity force, propeller thrust force, and propeller torque. S235JR steel was defined as the material. A design grid with tetrahedral elements with a single element size of 2 mm was used. As part of the simulation study, four structural solutions for the test engine mounts were calculated in terms of strength. The results of stress maps and the magnitude of deformation of the mount elements were compared. Based on the obtained results, one of the mount versions was recommended for actual fabrication.

19

Experimental Investigation on Indicated Pressure and Heat Release for Direct Hydrogen Injection in a Dual Fuel Diesel Engine

Siadkowska Ksenia, Barański Grzegorz, Sochaczewski Rafał, Wendeker Mirosław

Advances in Science and Technology. Research Journal

|

2022

|

Vol. 16, no 3

54--66

EN

This paper presents the research results for a diesel and hydrogen fueled engine. The research object is a four-cylinder, four-stroke ADCR engine with a displacement of 2,636 cm3. In the experiments, glow plugs were replaced with compressed hydrogen injectors and a special adapter. Hydrogen was supplied directly into a combustion chamber using a test injector. A hydrogen dose in the tests was changed at selected test points and ranged from 0 to 160 dm3/min. The research were conducted at 1,500 rpm. A hydrogen injection start angle and maximum hydrogen dose were specified from the preliminary experiments. The following parameters were analyzed: indicated mean effective pressure, maximum pressure, crank angle of maximum cylinder pressure occurrence and heat release. The obtained results were statistically analyzed. The conducted analysis focused on determining whether there are significant differences between early and late injection and how these changes affect the measured parameters.

20

Impact of defective turbocharging system on the safety and reliability of large marine diesel engine

Anantharaman M., Islam R., Sardar A., Garaniya V., Khan F.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

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2021

|

Vol. 15 No. 1

189--198

EN

Today huge capacity sea-going vessels are propelled by mega high-powered marine diesel ‎engines, referred to as Main Engine. Turbocharging system is an integral part of large marine diesel engine plant, ‎contributing to their safety, reliability, and efficiency. Defects in the turbocharging system ‎could result in higher fuel consumption, erratic running of the Main Engine, and in the worst ‎scenario may result in the stoppage of the Main Engine at sea. An inefficient turbocharging system may also cause major damage to turbochargers, resulting in undesirable accidents out at sea. To ‎avoid such undesirable accidents and ensure smooth operations of the Main Engine, it is required to ‎address this concern. The aim of this research is to study the turbocharging system for a ‎large Main Engine using a Kongsberg engine ‎simulator. Various malfunction of the ‎Turbocharging system is considered, relevant data is collected and analysed. ‎Moreover, a Fault Tree Analysis, (FTA) is considered to identify the top undesirable event ‎which is the failure of the Main Engine. Based on the results of this study, various steps ‎are suggested to avoid failure of the Main Engine due to the defective turbocharging ‎system.‎