Wyniki wyszukiwania - BazTech

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Visualisation research of the flow processes in the outlet chamber–outlet bridge–inlet chamber zone of the gear pumps

Stryczek J., Antoniak P., Jakhno O., Kostyuk D., Kryuchkov A., Belov G., Rodionov L.

Archives of Civil and Mechanical Engineering

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2015

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Vol. 15, no. 1

95--108

EN

This paper is a presentation of the theoretical analysis and visual experimental investigation on flow processes in the inlet chamber, outlet bridge and inlet chamber of the gear pump, commonly known as the trapped volume. In order to achieve that, the size and location of the considered chambers and bridge were determined, and next, the theoretical analysis was carried out. In order to verify the theoretical consideration, an experimental gear pump with transparent (plexi) bodies was designed and built. The pump was tested on a dedicated test stand. The visualisation research conducted for different values of the operational parameters (inlet pressure, temperature, rotational speed) proved the previously carried out theoretical analysis to be correct and, simultaneously, showed that there are areas in the gear pump where the flow processes are seriously disturbed. In order to eliminate the disadvantageous phenomena and processes observed in the pump, a new type of relief grooves was added to the design of the considered area (the solution was developed originally by the authors of this paper), which was consequently theoretically and experimentally examined. The results of both types of the research proved definitely that the application of the relief grooves resulted in a considerable reduction of the negative phenomena and processes in the considered area of the gear pump.

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Komputerowa symulacja procesów zachodzących w komorze koksowniczej

Słupik Ł., Fic A., Nowicki G.

Piece Przemysłowe & Kotły

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2014

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1-2

15--20

PL

W artykule przedstawiono model matematyczny procesów cieplnych oraz przepływowych zachodzących podczas koksowania wsadu węglowego w komorze koksowniczej. Model uwzględnia przepływ ciepła na drodze dyfuzji, konwekcji oraz promieniowania. Jednocześnie zamodelowano lokalne procesy odparowania oraz skraplania wilgoci, kinetykę uwalniania części lotnych wraz z towarzyszącymi im efektami energetycznymi. Uzyskane wyniki modelowania pokrywają się z pomiarami eksperymentalnymi wykonanymi na doświadczalnej instalacji pieca z ruchomą ścianą. Model matematyczny opracowano w Instytucie Chemicznej Przeróbki Węgla w Zabrzu w ramach projektu Inteligentna Koksownia.

EN

Within article a mathematical model of thermal and flow process occurring within coking chamber is presented. The model encompasses coupled diffusive, convective and radiative heat transfer. At the same time range of aspects associated with carbonization process such as: water evaporation and condensation, kinetics describing release of volatiles accompanied with energy effect are considered. Obtained results coincident well with measurement conducted on the experimental coking chamber. The mathematical model was developed at Institute for Chemical Processing of Coal as a part of the project entitled "Smart Coke Plant Meeting the Requirements of Best Available Techniques".

3

Laboratory stand for investigations of the quick-changing temperature of gas flowing in the piston compressor outlet channel

Puzdrowska P.

Journal of Polish CIMAC

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2014

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Vol. 9, no 1

111-120

EN

This paper presents a laboratory stand, created as a part of work on the doctor dissertation, intended for investigation of heat and flow processes taking place in the Espholin H3S piston compressor outlet channel. The test stand elements and their configuration within the stand are described. Discussed are also problems connected with the quick - changing measurement technique, solutions which have been proposed so far in that technology and premises are determined of choosing most suitable methods for measuring quick - changing temperature of outlet gases in piston machines as a diagnostic parameter.

4

Modelowanie procesów przepływowych w poziomym gruntowym wymienniku ciepła pompy grzejnej przy ruchu wód podziemnych

Fic A., Hanuszkiewicz-Drapała M., Składzień J.

Zeszyty Naukowe Katedry Mechaniki Stosowanej / Politechnika Śląska

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2003

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z. 20

105-110

PL

W pracy przedstawiono rezultaty obliczeń numerycznych pola temperatury w otoczeniu rur gruntowego wymiennika ciepła pompy grzejnej oraz jednostkowego strumienia ciepła pobieranego od gruntu. Przeanalizowano wpływ ruchu wody gruntowej na strumień ciepła przejmowanego od gruntu w przykładowym wymienniku z rurami poziomymi.

EN

Results of numerical calculations for underground heat exchanger of heat pump are presented in the paper. Determination of the temperature distributions in the domain neighbouring pipes, as well as heat flux densities transferred from the ground, were the main aim of the calculations. Influence of the moisture flow on the heat flux transferred from the ground in the exemplary horizontal exchanger is also analysed.