有侧滑角椭圆弹身大攻角状态绕流的数值模拟

The Numerical Simulation of Flow Around an ElliPtical Body at Roll Angle and High Incidence

用数值模拟方法研究了椭圆细长体在大侧滑角、大攻角状态下的流动特性。数值模拟的出发方程为三维可压缩流的全Ｎ－Ｓ方程，数值格式为ＴＶＤ格式。通过数值模拟，研究了椭圆截面细长体在Ｍ∞＝２．５、侧滑角β＝４５°状态下，攻角从１０°～３５°范围内流场中的分离特征。

The characteristics of flow over an elliptical body at 45°roll angle and high incidence are investigated by numerical method. The governing equations are the three dimensional compressible Navier-Stokes equations,the numerical scheme is implicit TVD algorithm. Through the numerical simulation, solutions are presented for the elliptical body with roll angle of 45° and different angles of attack, the emphasis is focused upon the leeside vortical flow.