Abonnement à la biblothèque: Guest

ISSN Online: 2377-424X

ISBN Print: 1-56032-797-9

International Heat Transfer Conference 11
August, 23-28, 1998, Kyongju, Korea

DEFINITION OF THE THERMAL BOUNDARY CONDITIONS AROUND A HIGH SPEED DIESEL ENGINE PISTON

Get access (open in a dialog) DOI: 10.1615/IHTC11.400
pages 235-240

Résumé

We elaborated a calculation method of the steady temperature field in a high speed Diesel engine. The necessity of taking into account the thermal interactions between the piston and its environment lead to the global modelling of the engine as a system.
We first modelled each type of heat transfer influencing the thermal behaviour of the engine: heat sources, heat transfer between the walls of the engine and the flowing fluids or between the mechanical parts. In order to improve the knowledge about oil jet cooling of pistons, we modelled the unsteady behaviour of the jet as well as the oil flow under the piston.
Thus, we modelled the whole Renault F8Q engine using the nodal analysis method. This model allows the calculation of the temperature field in the whole engine as well as the heat transfer between the piston and its environment.
The model was validated thanks to temperature measurements achieved in the engine. Satisfying agreement was observed between numerical and experimental results. Temperature differences between calculations and measurements were of the same magnitude as the differences between the various tests.