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Instantaneous Heat Transfer over the Piston of a Motored Direct injection Type Diesel Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1989 by SAE International in United States
Annotation ability available
The instantaneous heat transfer through the piston was measured in a motored direct injection-type diesel engine. The engine piston was equipped with a fast-response thermocouple on the surface and at a specified distance below the surface thermocouple at a number of locations. In order to record and process the measurement of temperature and cylinder pressure, a personal computer (PC)-based data acquisition system was connected to the probes, A special linkage device was designed and implemented to connect the thermocouple wires between the bottom of the connecting rod and a stationary point on the oil pan. The surface heat flux was calculated using a one-dimensional conduction model with the measured temperature boundary conditions. The in-cylinder pressure data was used to calculate the cylinder air temperature and the instantaneous film heat transfer coefficient was calculated by using those in-cylinder measurements. The results of the experiment were discussed and compared to the previous results and the predictions made by others. The measured heat flux/engine speed relationship agreed with previous results. However, the measurements at various positions and at a range of intake manifold pressures did not check with prior predictions. The discrepancies could be contributed to different engine and operation conditions used.
CitationMure, C. and Rhee, K., "Instantaneous Heat Transfer over the Piston of a Motored Direct injection Type Diesel Engine," SAE Technical Paper 890469, 1989, https://doi.org/10.4271/890469.
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