Abstract: A numerical method for calculating subsonic and supersonic loads around vehicle is developed. By applying the Green function method, a unified method for evaluating the load of subsonic and supersonic steady and unsteady potential flow is obtained. The 089B model being used as an example, the surface of the vehicle (including wake) is divided into small quadrilateral elements replaced by hyperboloidal elements. This yields a set of linear algebraic equations relating to unknown potential. Then the pressure distribution is evaluated by the finite difference method for polential. Numerical results show that the method given in this paper is not only general for using, but also considerably accurate for calculation. It can be applied to calculate vehicle aerodynamic loads.

Key words: suhsonie flow, supersonic fow, aerodynamic loads, numerical calculation, Greenfunction