CFD simulations as a support of experimental research in a rapid compression expansion machine facility

• Autorzy: Jach A. , Pyszczek R. , Kapusta Ł. J. , Teodorczyk A.

Identyfikatory

DOI

10.5604/01.3001.0012.4786

• Języki publikacji: EN

Abstrakty

EN

The main aim of this study to reproduce methane combustion experiment conducted in a rapid compressionexpansion machine using AVL FIRETM software in order to shed more light on the in-cylinder processes. The piston movement profile, initial and boundary conditions as well as the geometry of the combustion chamber with a prechamber were the same as in the experiment. Authors by means of numerical simulations attempted to reproduce pressure profile from the experiment. As the first step, dead volume was tuned to match pressures for a non-combustion (air-only) case. Obtained pressure profile in air compression simulations was slightly wider (prolonged occurrence of high pressure) than in the experiment, what at this stage was assumed to have negligible significance. The next step after adjusting dead volume included combustion simulations. In the real test facility, the process of filling the combustion chamber with air-fuel mixture takes 15 s. In order to shorten computational time first combustion simulations were started after the chamber is already filled assuming uniform mixture. These simulations resulted in more than two times higher maximum pressure than recorded in experiments. It was concluded that turbulence decays quickly after filling process, what was also confirmed by next combustion simulations preceded by the filling process. Then the maximum pressure was significantly decreased but still it was higher than in the experiments. Based on the obtained results it was assumed that the discrepancy noticed in air cases is further increased when combustion is included. Moreover, the obtained results indicated that pre-combustion turbulence level is very low and suggested that either piston profile movement is not correct or there is high-pressure leak in the test facility.

Słowa kluczowe

EN

AVL FIRETM; self-ignition; RCEM; CFD; knocking combustion

• 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: 2018
• Tom: Vol. 25, No. 4
• Strony: 141--147
• Opis fizyczny: Bibliogr. 8 poz., rys.

Twórcy

autor

Jach A.

• Warsaw University of Technology, Institute of Heat Engineering Nowowiejska Street 21/25, 00-665 Warsaw, Poland tel.: [phone]

autor

Pyszczek R.

• Warsaw University of Technology, Institute of Heat Engineering Nowowiejska Street 21/25, 00-665 Warsaw, Poland tel.: [phone]

autor

Kapusta Ł. J.

• Warsaw University of Technology, Institute of Heat Engineering Nowowiejska Street 21/25, 00-665 Warsaw, Poland tel.: [phone]

autor

Teodorczyk A.

• Warsaw University of Technology, Institute of Heat Engineering Nowowiejska Street 21/25, 00-665 Warsaw, Poland tel.: [phone]

Bibliografia

• [1] Wang, Y., Liu, H., Reitz, R. D., Knocking combustion in spark-ignition engines, Progress in Energy and Combustion Science, Vol. 61, pp. 78-112, 2017.
• [2] Ceschini, L., Morri, A., Balducci, E., Cavina, N., Rojo, N., Calogero, L., Poggio, L., Experimental observations of engine piston damage induced by knocking combustion, Materials & Design, Vol. 114, pp. 312-325, 2017.
• [3] Karvountzis-Kontakiotis, A., Vafamehr, H., Cairns, A., Peckham, M., Study on pollutants formation under knocking combustion conditions using an optical single cylinder SI research engine, Energy, Vol. 158, pp. 899-910, 2018.
• [4] ASTM, Standard test method for research octane number of spark-ignition engine fuel, ASTM D2699-16, 2016.
• [5] ASTM, Standard test method for motor octane number of spark-ignition engine fuel, ASTM D2700-16a, 2016.
• [6] Eisen, S., Visualisierung der dieselmotorischen Verbrennung in einer schnellen Kompressionsmaschine, Lehrstuhl A für Thermodynamik, Technische Universität München, Germany 2003.
• [7] Pöschl, M., Sattelmayer, T., Influence of temperature inhomogeneities on knocking combustion, Combustion and Flame, Vol. 153, Iss. 4, pp. 562-573, 2008.
• [8] AVL FIRETM Version 2014.2 – The FIRE Combustion Module Manual, 2014.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).