Measurements of instantaneous surface temperature variations have been made at five positions of the combustion chamber side of the cylinder head of a modern four-valve, high speed Diesel engine with external supercharging. By means of analysing the measured data and calculating the engine cycle local and local-average instantaneous heat transfer coefficients have been derived. It became evident that the steady-state component of the total heat flux into the solid wall normal to the surface can only be determined inexactly by measurements, because of none-one-dimensional temperature distribution in the wall, whereas the fluctuating component can be calculated exactly enough from the measured surface temperature variation. Finally the measured local and local-mean instantaneous heat transfer coefficients are compared with the results of Woschni's formula for the local-average heat transfer coefficient. The agreement is very good as far as the variation with time and the integral of the high pressure phase of the cycle are concerned.
EXPERIMENTAL INVESTIGATION OF THE INSTANTANEOUS HEAT TRANSFER IN THE CYLINDER OF A HIGH SPEED DIESEL ENGINE
Sae Technical Papers
1979 SAE International Off-Highway and Powerplant Congress and Exposition ; 1979
01.02.1979
Aufsatz (Konferenz)
Englisch
British Library Conference Proceedings | 1994
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