为了得到具有最小阻力系数的空心弹外形,基于雷诺平均方程以及二阶AUSM格式,对不同空心弹气动外形的二维流场以及气动力进行了数值计算,得到了不同外形条件下空心弹的内外流场特性,以及阻力系数变化曲线与最小阻力系数的空心弹气动外形.另外,分别对具有最小阻力系数的空心弹与常规空心弹的超声速流场进行了数值模拟,对比分析了二者流场结构的异同,数值验证了具有最小阻力系数弹型的减阻效果,可为相关研究提供参考.%With the purpose of obtaining the minimum drag coefficient of a normal hollow projectile,based on RANS governing equations and 2nd-order AUSM scheme,the two-dimensional flow fields and aerodynamic forces of different shapes of hollow projectiles have been simulated numerically,both the external and internal flow features of hollow projectiles with different shapes are obtained,as well as the drag variation curves and the aerodynamic shape of the hollow projectile with the minimum drag coefficient.Moreover,the projectile with minimum drag coefficient and normal projectile with ultrasonic sound flow fields are simulated respectively,the flow characteristics of them are discussed and compared,and the minimum drag effect of the obtained projectile is validated,our numerical results can provide important guidance for relative investigations.
展开▼
