This paper describes work carried out to investigate the spatial variation of instantaneous heat transfer within the combustion chamber of a highly rated DI diesel engine. Testwork was carried out on a Ricardo Proteus research engine of 130 mm bore and 150 mm stroke. An instantaneous heat flux probe was designed and developed incorporating a surface thermocouple. Although the surface thermocouple was of conventional design, dynamic Finite Element thermal analysis of the thermocouple has shown that calculation of instantaneous heat flux from surface temperature fluctuations is not straight-forward due to multi-dimensional heat flow. Instantaneous heat transfer from key positions within the cylinder head of the engine show considerable differences in both peak heat transfer rates and overall characteristics. Measurements from these key positions were area averaged over the combustion chamber surface to compare total instantaneous heat transfer with established models.
An experimental assessment of instantaneous heat transfer within a highly rated DI truck engine
Experimentelle Bewertung des momentanen Waermeuebergangs bei einem hochgradigen DI Lastwagenmotor
Experimental Methods in Engine Research and Development, Seminar ; 1988-2 , Mar ; 159-168
1988
10 Seiten, 8 Bilder, 2 Tabellen, 19 Quellen
Conference paper
English
An experimental assessment of instantaneous heat transfer within a highly rated DJ truck engine
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