Impact of rise of exhaust resistance at torque and angular speed of two-stroke engine

• Autorzy: Dereszewski M. , Charchalis A.

Identyfikatory

DOI

10.5604/12314005.1168447

• Języki publikacji: EN

Abstrakty

EN

It is assumed that elements of Exhaust Gases Cleaning Systems creates additional resistance along fumes duct and can affect energetic process of combustion. In the paper are presented results of researches aimed on detection and recognition of dumping effect in the exhaust pipeline using devices dedicated for engine’s torque and angular speed measurement. The experiment was carried out in test stand of Gdynia Maritime University; equipped with one-cylinder, low speed engine working in two-stroke mode. Effect of increasing of gas flow resistance was achieved by installation of shutters in cross-section of exhaust pipe. The shutters diminished active flow „window“ for 50% of normal crossection area of the exhaust pipe The plan of measurements encompasses registration of Instantaneous Angular Speed of the engine’s shaft and parallel registration of Instantaneous Value of Shaft Torsion, what reflect fluctuation of torque. Value of angular speed and toque enables exact calculation of power produced by the engine. Experiment included measurements at different levels of engine’s load and with changes of mean rotational speed. Angular speed and shaft’s torsion were measured and recorded using system ETNP-10 which is based on optical sensor and set of toothed discs. That method gives high accuracy of angular speed and torsion measurement. Results of experiment are presented as difference of related curves of values’ variations of angular speed and torsion occurring at the propulsion shaft connecting the engine and the water brake.

Słowa kluczowe

EN

diagnostics; diesel engine; exhaust pipe resistance; torque; angular speed

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2015
• Tom: Vol. 22, No. 4
• Strony: 87--93
• Opis fizyczny: Bibliogr. 7 poz., rys.

Twórcy

autor

Dereszewski M.

• Gdynia Maritime University Mechanical Faculty Morska Street 83, 81-225 Gdynia, Poland tel.: [phone]

autor

Charchalis A.

• Gdynia Maritime University Mechanical Faculty Morska Street 83, 81-225 Gdynia, Poland tel.: [phone]

Bibliografia

• [1] Pawletko, R., Ocena wrażliwości diagnostycznej przebiegu ciśnienia indykowanego średnioobrotowego silnika spalinowego, Diagnostyka, Vol. 31, 2004.
• [2] Polanowski, S., Studium metod analizy wykresów indykatorowych w aspekcie diagnostyki silników okrętowych, Zeszyty Naukowe AMW, Nr 169 A, Gdynia 2007.
• [3] Dereszewski, M., Charchalis, A., Polanowski, S., Analysis of diagnostic utility of instantaneous angular speed of a sea going vessel propulsion shaft, Journal of KONES, Vol. 18, No. 1, 2011.
• [4] Charchalis, A, Dereszewski, M., Processing of instantaneous angular speed signal for detection of a diesel engine failure, Mathematical problems in engineering, Hindawi Publishing 2013.
• [5] Dereszewski, M., Wykorzystanie modelu dynamicznego silnika Sulzer 3Al25/30 do symulacji wpływu zmian obciążenia i uszkodzeń na fluktuację prędkości kątowej, Zeszyty Naukowe AM, Nr 81, Gdynia 2013
• [6] Piotrowski, I. Witkowski, K., Okrętowe silniki spalinowe, Trademar, Gdynia 2003
• [7] Wojnowski, W., Okrętowe Siłownie spalinowe, Wydawnictwa AMW, Gdynia 1999.