Research on the fluctuating pressure empirical formula of flight vehicle

Prediction of fluctuating pressure environment, which is induced by flow separation, shock-wave intersection, etc., in high-speed flow, is an important problem for flight vehicle design. Based on published engineering prediction methods, combined with recent wind tunnel tests, fluctuating pressure characteristics under various flow mechanisms are studied in this paper, including attached turbulent flow, separated flow, transonic oscillating flow, and shock-wave intersection, etc. Empirical formulas for fluctuating pressure prediction are fitted and verified. The results show that fluctuating pressure induced by shock-wave intersection can reach a high energy level, and engineers should pay enough attention to this problem.