可旋转鸭舵对旋转弹丸纵向气动特性的影响

CFD Prediction of Longitudinal Aerodynamics for a Spinning Projectile with Fixed Canard

利用有限体积TVD格式,对旋转弹丸的气动特性进行数值分析.对旋转弹丸SOCBT在马赫数为3的典型算例进行了验证计算,并进行了可旋转固定鸭舵对旋转弹丸纵向气动特性的影响的数值分析.计算了鸭舵位于不同方位角、不同飞行马赫数、不同攻角下时旋转弹丸的纵向气动力系数.研究结果表明,该数值分析方法能准确地分析纵向气动力系数随鸭舵方位角的变化规律,可为分析弹道修正规律提供依据.

A computational study performed for an artillery projectile using finite volume TVD schemes is described in this paper.First,computed Magnus moment coefficients for the spinning projectile have been compared with the available experimental data of SOCBT at Mach 3 and are found to be generally in good agreement.The results demonstrate that the method can provide an accurate and viable approach for this problem.Then,computational fluid dynamics（CFD） modeling and analysis of the spinning projectile with fixed canard have been conducted to determine the longitudinal aerodynamic coefficients.The analyses provide a detailed understanding of the effects of canard with different circumferential position on longitudinal aerodynamic coefficients at three supersonic speeds and various angles of attack.