某鸭式布局弹箭的俯仰动导数计算与分析

摘要

In order to study the pitching dynamic characteristic of canard configuration missile(CCM),a method of predicting pitching dynamic-derivatives of CCM was studied by dynamic patched-grid and forced vibration method based on solving N-S equations.A standard research configuration,known as the Basic Finner,was studied under forced pitching conditions.The numerical results are in good agreement with the experiment data.The method has high accuracy,and the selected initial-conditions is practical.The changing relation between pitching dynamic-derivatives of CCM and angle of attack or Mach number was studied.The result shows that the rule of the pitching dynamic derivatives changing with Mach number or angle of attack accords with the changing rule of pitching moment coefficients for CCM.%为了研究鸭式布局弹箭俯仰动态特性,应用基于N-S方程求解的时空二阶精度的隐式迭代算法,结合刚性动网格技术,采用小振幅强迫俯仰振动法,对某鸭式布局弹箭的俯仰动导数数值计算进行了研究.以国际动导数Finner标模为对象进行了计算验证,计算结果与实验结果吻合良好,表明该文采用的方法具有较高的精确性,使用的计算条件是可行的.在此基础上,进一步探究了某鸭式布局弹箭俯仰动导数随初始攻角、马赫数的变化关系,结果表明,对于该鸭式布局弹箭,其俯仰动导数随攻角、马赫数的变化规律与俯仰力矩系数的变化规律基本保持一致.