A Numerical Study of Blowing Effect on Wall Heat Trasfer Rate over Blunt-bodies Using Naver-Stokes Method

Navier-Stokes 방법을 이용한 Blowing이 무딘물체 주위의 표면 열전달에 미치는 효과 연구

A finite-difference method based on characteristic upwind flux difference splitting has been studied on the blowing effect on the wall heat transfer over blunt-bodies. As the blowing rates increased, the wall heat transfer rate decreased and the temperature gradient also decreased compared with no blowing case. The heat trasfer rate at Mach No. 20 was almost twice higher than that of Mach No. 15 at 50km altitude. The surface blowing can be an effective mechanism to reduce the surface heat transfer rate at hypersonic flight condition.