CFD를 이용한 bleed모델의 데이터베이스 보정

초록

Database of a bleed model, which developed as a boundary condition model for porous bleed wall, has been corrected using CFD simulations to enhance the performance of the bleed model. The existing bleed model underestimates bleed flow rate because flow acceleration near bleed regions is ignored. Also, it is over-predicts sonic flow coefficient when bleed plenum pressure ratio is high. To correct the problems, and to enhance the performance of the bleed model, the database is corrected using CFD simulations to compensate the flow acceleration near the bleed region. Furthermore, the database of the bleed model is extended with second order extrapolation. Numerical simulations of a shock-boundary layer interaction problem of a solid wall with a bleed region reveal that the modified database gives more accurate results than the existing database.