Foreshowing study of dynamic environment on the sphere-cone-cylinder reentry vehicles

The stable and fluctuating pressure distribution on the surface of the sphere-cone-cylinder reentry vehicle was investigated in the supersonic and hypersonic flow field. Computation fluid explorer (CFX) was used to model the grid which had been analysis of three-dimension steady flow and unsteady flow field. Meanwhile the new engineering method of the surface of the sphere-cone-cylinder reentry vehicle was given. Then, the theory and estimation method was compared, which tested and verified the feasibility and applicability of this method. The effect of fluctuating pressure distribution on the surface made by Mach number and attack angle was researched. Taking advantage ANSYS, the model of dynamic analysis of reentry vehicle in missile's head was created. Meanwhile, according to the method fluctuating pressure and random vibration theory of reentry vehicle, the root mean square (RMS) and power spectral density (PSD) of acceleration response was presented by spectrum analysis, which was very practical and applicable.