Study on Cooling Effectiveness of Various Film Coolings

The cooling effectiveness of following film cooling types for expansion regulating parts of high performance aeroengine nozzle has been calculated and compared:slot film cooling,full coverage film cooling,and compound slot and full coverage film cooling.The method to calculate the film cooling effectiveness for multi-row of holes and for compound slot and full coverage is developed on the basis of film cooling effectiveness for single row of holes film and for slot.The temperature distribution when taking into account the effect of high temperature gas radiation and film cooling is calculated,the result provides beneficial references to selecting film cooling type for nozzle of high performance aeroengine nozzle.