FLOWFIELD CALCULATION OF HOLLOW PROJECTILE USING IMPLICIT LU-SGS SCHEME BASED ON UNSTRUCTURED MESHES
非结构隐式LU-SGS方法在空心弹丸流场数值模拟中的应用

The implicit LU-SGS scheme based on unstructured meshes is employed to solve three-dimensional Euler equations. The flow field of a hollow projectile is numerically simulated for different Mach number and different attack angle. Complicated flow structure and its lift and drag characteristics are discussed. The numerical results indicate that the drag coefficient of a hollow projectile is smaller by about 30 percent than that of a common projectile with the same diameter, and the correlations between the drag and the lift coefficients of the hollow projectile and the attack angle are in agreement with those of the common projectile. The results are relevant to engineering designs.