Numerical Simulation Of Characteristics Of Heat Transfer Of Turbulent Jet Into The Transflow

The paper investigates the effects of different injection angles and different jet holes on the temperature field of jet in crossflow,based on the engineering background of plate film cooling.The investigation used the method of numerical simulation,with Realizable k-εturbulent model,finite control volume method and unstructured meshes.Through comparing and analyzing the temperature fields of jet in crossflow with 135°,90°and 45°injection angles,characteristics of temperature fields of streamwise injection,normal injection and unstreamwise injection were summarized.And through comparing and analyzing the temperature fields of jet in crossflow with dust-pan shaped hole,cone shaped hole and round hole,characteristics of temperature fields of different shaped holes were summarized.The results suggests that the temperature fields near the wall are affected mainly by the central temperature of jet and the distance between jet and wall.The actions of main stream rounding the jets are important influence factors to the temperature fields near the back of jet holes.And the film-cooling effectiveness would be higher if the streamwise injection were used.The film cooling effectiveness and cover region of jet of dust-pan shaped hole are greater than round hole and cone shaped hole at the same boundary conditions.The research work of this paper has great meanings to increase the film-cooling effectiveness and improve new cooling technology.