Abstract
Aiming at understanding the characteristics of unsteady heat transfer on the combustion chamber walls of diesel engine and obtaining the basic data to establish a prediction method, simultaneous multi-point measurement of unsteadey heat flux is conducted. To investigate the influence of combustion parameters on the heat transfer to the walls, a single cylinder test engine is operated under the various kinds of engine conditions, such as swirl velocity, fuel injection pressure, the diameter of fuel injection nozzle and fuel injection timing. As a result, the influences of those parameters on unsteady heat flux are clarified quantitatively and investigated in relation to the prediction of in-cylinder combustion phenomena.
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