双模制导航弹静稳定性数值分析

Numerical Analysis of Static Stability for Bi-module Guidance Bomb

采用二阶Roe格式求解三维N-S方程,根据航弹雷诺数较高、计算网格不规则的特点,选用Spalart-Allmaras代数模型。首先,对卫星制导航弹绕流流场进行大量数值模拟,与风洞吹风试验数据对比,验证了数值方法的有效性。在此基础上对双模制导航弹在不同的攻角和不同来流速度以及不同舵偏角下的绕流流动进行数值模拟,对航弹的升阻特性、纵向静稳定性进行了详细分析,获取的气动参数分布规律对此类双模制导航弹气动布局设计具有一定的参考价值。

Adopting two-order Roe format to solve three-dimensional Navier-Stokes equation,according to the characteristic of being higher in Reynold＇s number and anomalous in computing grid,it was selected to the Spalart-Allmaras algebra model.In the paper,firstly it made lots of numerical simulation for streaming around flow field of satellite guidance bomb,and then compared with the experimental data of wind tunnel test,and it verified the effectiveness of numerical method.Based on the above,it made the numerical simulation for bi-module guidance bomb under the condition of streaming around flow field at different attack angle and flow rate as well as rudder drift angle,and analyzed the rising resistance characteristic and vertical static stability in detail.From obtained regularities of distribution in pneumatic parameter,it can be seen that it a certain reference value for design of this kind of bi-module guidance bomb in overall pneumatic arrangement.