相近弹形气动参数的确定方法

Method of Determining Aerodynamic Parameters of Guided Projectiles Having Analogous Configuration

提出由已知一种制导炮弹(Ⅰ型)气动特性(利用气动仿真对比计算与飞行对比试验方法)确定另一种气动外形相近的制导炮弹(Ⅱ型)的气动特性的方法.利用Jameson有限体积法求解空间流场的欧拉方程,采用笛卡尔网格技术分别对2种气动外形进行了气动力对比仿真计算.根据对比飞行试验数据对2种弹落点参数、雷达径向速度进行气动参数辨识.结果表明,仿真计算结果与根据落点参数及雷达径向速度辨识结果基本一致.该方法为根据已知气动外形准确确定另一种相近气动外形气动参数提供了一种途径.

Puts forward a method to get the aerodynamic parameters of new types of guided projectiles based on a known type with analogous configuration(by means of comparing calculation and flight tests).Jameson finite volume method is applied to solve the flow field of Euler sets of equations.An equally spaced Cartesian mesh structure is adopted to do the aerodynamic calculation.Both the aerodynamic identification technology and the match calculation method are used to calculate the drag coefficient of the type II guided projectile according to the comparison flight test.The result shows that different methods can lead to the same conclusion.The method can be used in the development of a series of guided projectiles.