Analysis of thermal loads in air cooled SI engine

• Autorzy: Mitianiec W. , Buczek K.
• Języki publikacji: EN

Abstrakty

EN

In the spark ignition engines with air cooling system the thermal loads of the cylinders and cylinder heads are much bigger than in the water-cooled engines and the loads are not uniform on the whole surface of these elements. Recently most of the cylinders and cylinder heads of the two-wheel vehicles had long ribs that caused a bigger noise and an increase of the mass of the elements. The paper includes the modelling process of the thermal loads and temperature distribution of the cylinder and cylinder head of the two-stroke engine 115 cm3 capacity cooled by air at mean engine load. The results of simulation carried out in ANSYS program with creation of the mesh in CATIA were verified by the experiment on the real engine. The results obtained in the tests and the simulation show, that long ribs have not an effect on the decrease of thermal loads of the cooling elements. The paper includes the colour graphs with deviation of the parts, temperature on the surfaces and thermal stresses. Maun work results allow finding that the cooling heat in the air-cooled two-stroke engine increases with the engine speed and cooling energy, boundary condition enables determine the convection coefficient for heat exchange calculations and FEM enables the prediction of the surface temperatures of the walls, the accuracy of temperature depends on the determination of the outflow temperature of the air.

Słowa kluczowe

EN

combustion engines; heat transfer

• 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: 2007
• Tom: Vol. 14, No. 3
• Strony: 403--410
• Opis fizyczny: Bibliogr. 9 poz., rys.

Twórcy

autor

Mitianiec W.

autor

Buczek K.

• Cracow University of Technology Al. Jana Pawla II37, 31-864 Krakow, Poland tel.: [phone], fax: [phone],

Bibliografia

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• [3] Taler, J., Duda, P., Rozwiązywanie prostych i odwrotnych zagadnień przewodzenia ciepła, WNT, Warszawa, 2003.
• [4] Tillock, B., Martin, J., Measurement and Modelling of Thermal Flows in an Air-Cooled Engine, SAE 961731, SAE International Off-Highway & Powerplant Congress, Indianapolis, 1996.
• [5] Wajand, J., Tłokowe silniki spalinowe średnio- i szybkoobrotowe, wyd. 4-te zmienione, WNT, Warszawa, 2005.
• [6] Szargut, J., Termodynamika, PWN, Warszawa, 1975.
• [7] Krysicki, W., Włodarski, L., Analiza matematyczna w zadaniach, Cz. II. PWN, 2002.
• [8] Heywood, J., Internal Combustion Engine Fundamentals, McGraw-Hill, N. York, 1988.
• [9] Dokumentacja programu ANSYS Workbench.