Experimental Study on Temperature Field and Influences in the Rear Engine Compartment

Abstract:

The temperature field in the rear engine compartment was measured and its cause was analyzed with the bus road test for defective cooling system in the rear engine compartment. The relationship between temperature field and brake specific fuel consumption at different bus speeds is compared. The comparative study results explains why the temperature field changes with bus speeds and indicates that when the cooling capacity of the cooling system is large enough, the air mass flow of cooling air is in proportion to the heat release of the radiator. Flow field and heat transfer characteristics are analyzed in engine compartment according to the field synergy principle. A proposal is put forward to try out decreasing vortex and keeping the direction of flow and temperature gradient consistent in the arrangement of rear compartment.