固定鸭舵双旋火箭弹超声速侧向气动特性

Lateral Aerodynamics of a Fixed-canard Dual-spin Rocket Projectile at Supersonic Speed

为研究加装了固定鸭舵修正组件的双旋火箭弹的气动特性,采用ANSYS Fluent软件计算弹体周围流场,采用滑移网格方法模拟弹箭旋转运动,在验证数值方法的基础上,对超声速下无鸭舵、鸭舵修正组件不旋和鸭舵修正组件反旋3种状态的双旋火箭弹进行数值模拟,重点分析了鸭舵修正组件对全弹和部件侧向力的影响。计算结果表明:加装鸭舵修正组件后,全弹阻力系数和法向力系数增加,侧向力系数随攻角大幅增加;弹体侧向力受鸭舵的影响最大,也是全弹侧向力的主要组成部分,尾翼次之,修正组件产生的侧向力最小;加装修正组件后,鸭舵尾涡与弹体体涡相互干扰是弹体和尾翼侧向力增加的主要原因。

In order to study the aerodynamic characteristics of a fixed-canard dual-spin rocket projectile,the software ANSYS Fluent was used to calculate the flow field around the projectile,and the sliding-mesh method was applied to simulate the rotation motion.Three states at supersonic speed such as no canards,reverse-spinning canards correction fuse and non-spinning canards correction fuse,were simulated numerically on the basis of verifying the reliability of numerical method.The aerodynamic influence of the canards correction fuse on the lateral force of overall projectile and its components was analyzed emphatically.The results show that the drag coefficient and normal force coefficient of the overall projectile increase,and the lateral force coefficient increases significantly with the angle of attack after the installation of the canards correction fuse.The lateral force produced by the projectile body is most affected by the canards,which is the main component of the lateral force of overall projectile,followed by the tail fins,and the lateral force produced by the correction fuse is the smallest.After installing the canards correction fuse,the interaction between wake vortex of the canards and the body vortex is the main reason for the increase of lateral force produced by the body and the tail fins.