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http://yadda.icm.edu.pl:80/baztech/element/bwmeta1.element.baztech-article-BUJ5-0030-0072

Czasopismo

Journal of KONES

Tytuł artykułu

Heat transfer in combustion chamber of piston engines

Autorzy Jankowski, A. 
Treść / Zawartość
Warianty tytułu
Języki publikacji EN
Abstrakty
EN Measurements were made during downward propagation of a flat flame in a lean limit methane/air mixture. It was observed that the limit flames are very thick and that heat losses to the walls caused extensive cooling of the product gases within 0.05 m behind the propagating flame. Analysis of all data from well synchronized measurements as well as the results of following to them numerical calculations made possible to understand in detail physical picture of heat transfer from the hot gases to the cold walls. It is a unique way for explanation of heat transfer phenomenon. Measurements and calculations were used to prepare heat balance in a flammability tube. In the next step measurements were carried out in a rotating cylindrical combustion chamber. This chamber was treated as a model of piston engine combustion chamber with swirl. Temperature changes on a surface of the rotating combustion chamber were transmitted towards motionless data acquisition system. The temperature measurements were carried out with the use of special thermocouples located at the front wall of the chamber. Influence of rotation velocity on heat transfer was investigated in the range from 1000rpm to 5000 rpm. For a constant mixture concentration maximum temperature rise depended on the rotation velocity. Increased rotation velocity initially intensified heat transfer to the wall, with following to it increase of peak temperature, but further rise of rotation velocity resulted in local flame extinction near the s idę walls, decreased volume of combustion gases, and as a result of these, decreased value of peak temperature at the wall surface. Presented techniques make possible estimate heat losses to the walls in a combustion chamber of piston engines.
Słowa kluczowe
EN internal combustion engines   heat transfer   heat flux   combustion chamber   heat losses  
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 2010
Tom Vol. 17, No. 1
Strony 187--197
Opis fizyczny Bibliogr. 10 poz., rys.
Twórcy
autor Jankowski, A.
  • Institute of Aviation Krakowska Av. 110/114, 02-256 Warsaw, Poland tel: +48 22 8460011, fax.: +48 22 8464432, ajank@ilot.edu. pl
Bibliografia
[1] Aoki, Y., Emi, M., Kimura, S., Shimano, K., Enomoto, Y., An Experimental Study on Heat Transfer Coefficient of All Combustion Chamber Wall Surfaces in A Naturally Aspirated D.I. Diesel Engine, FISITA Proc. F2010-A-151, 2010.
[2] Demuynck, J., De Paepe, M., Sierens, R., Verhelst, S., Heat Transfer Measurements Inside a Gas Fuelled Spark Ignited Engine for Model Validation, FISITA Proc. F2010-A-062, 2010.
[3] Finol, C. A., Robinson, K., Thermal Modelling of Modern Engines: A Review of Empirical Correlations to Estimate the In-Cylinder Heat Transfer Coefficient, Proceedings of the Institution of Mechanical Engineers Part D-Journal of Automobile Engineering, 220 (D12), pp. 1765-1781, 2006.
[4] Han, Z., Reitz, R. D., A Temperature Wall Function Formulation for Variable-Density Turbulent Flows with Application to Engine Convective Heat Transfer Modelling, Int. J. Heat Mass Transfer, Vol. 40, No. 3, pp. 613-625, 1997.
[5] Heywood, J. B., Internal Combustion Engine Fundamentals, McGraw-Hill Book Company, 1987.
[6] Jankowski, A., Jarosinski, J. Slezak, M., Evaluation of Heat Transfer from Combustion Gases to Combustion Chamber Walls of Piston Engines, Proc. EAEC2009 01-049, 2009.
[7] Peters, N., Turbulent Combustion, Cambridge University Press, 2004.
[8] Sugihara, T., Shimano, K., Enomoto, Y., Suzuki, Y., Emi, M., Direct Heat Loss to Combustion Chamber Walls in a DI Diesel Engine, Development of Measurement Technique and Evaluation of Direct Heat Loss to Cylinder Liner Wall, SAE Technical Papers 2007-24-0006, 2007.
[9] Suzuki, Y., Shimano, K., Enomoto, Y., Emi, M., Yamada, Y., Direct Heat Loss to Combustion Chamber Walls in A Direct-Injection Diesel Engine, Evaluation of Direct Heat Loss to Piston and Cylinder Head, International Journal of Engine Research, Vol. 6, pp. 119-135, 2005.
[10]Woschni, G., A Universally Applicable Equation for the Instantaneous Heat Transfer Coefficient in the Internal Combustion Engine, SAE Paper No. 670931, 1967.
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