摘要
从全Navier Stokes方程出发 ,结合高雷诺数两方程κ ε湍流模型 ,应用三维隐式有限体积TVD格式 ,数值仿真了低阻远程弹丸在来流马赫数Ma∞ =0 .96 ,Ma∞ =1.1和Ma∞ =2 5 ,攻角α =4°时的绕流流场。为避免分区计算而用代数方法生成了弹丸绕流场O型网格 ,计算结果得到了清晰的流场波系结构 ,弹体的迎风面和背风面流场呈现明显的非对称性 。
Three kinds of external flow field of low-drag and long-range projectile at transonic and supersonic speed are numerically simulated. The mach numbers are 0.96, 1.1,and 2.5 respectively, the attack angle being 4°. The three dimensional Navier-Stokes equations with two-equation κ-ε turbulence models and implicit finite volume TVD scheme are applied. In order to avoid the zonal method, `O' type grid of single zone is produced by algebraic arithmetic. The clear flow structures are obtained. The flow fields in the wind side and leeside show apparent unsymmetry. The surface pressure distribution shows that the configuration of low drag and long-range projectile can improve the aerodynamic characteristics.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2002年第2期180-183,共4页
Acta Armamentarii
