다양한 Bleed 조건이 적용된 초음속 흡입구 성능 수치연구

Abstract

This paper deals with a numerical investigation of bleed effect on supersonic inlet performance under various bleed conditions. Because of high computational cost of direct simulation of each bleed holes, slaters 2009 bleed boundary condition model is used. Firstly, the bleed model is implemented and validated by solving validation cases. Then, a supersonic inlet used in Nagashimas experiments and bleeds are simulated to show the effect of bleed on performance of supersonic inlet. The kriging method in conjunction with a GA(Genetic Algorithm) is used to find the optimal condition of bleeds on the supersonic inlet, and EI(Expected Improvement) is introduced to enhance the kriging model. The optimal condition can be achieved when terminal shock is located in the throat of the supersonic inlet and an effect of flow separation is small.