高超声速弹头俯仰动态特性数值研究  

Numerical Study of Pitching Dynamic Characteristic for Hypersonic Missile

作　　者：贺国宏[1] 杨小亮[2] 赵海洋[2] 刘伟[2] 

机构地区：[1]第二炮兵装备研究院,北京100085 [2]国防科技大学航天与材料工程学院,湖南长沙410073

出　　处：《兵工学报》2009年第7期862-866,共5页Acta Armamentarii

基　　金：国家自然科学基金资助项目(90716015)

摘　　要：在Etkin的非定常气动力模型基础上,采用非定常Navier-Stokes方程描述高超声速导弹标模外形(HBS)的非定常强迫振动流场,引入采用Power限制器的空间三阶精度PWNND格式进行数值离散,研究HBS在不同攻角下的俯仰阻尼特性,并与实验及牛顿理论结果进行了对比;同时还研究了包括振动减缩频率、振动振幅及底部流动等因素对HBS俯仰阻尼特性的影响。The damping-in-pitch characteristic of hyperballistic shape （HBS） at different angles of attack was investigated and compared with the results of test and Newtonian method, the influence of reduced frequency, amplitude and base flow on the damping-in-pitch characteristic of HBS were also studied by the unsteady Navier-Stokes equations, which are solved with the third-order-in-space PWN- ND scheme constructed with power-limiter and used for describing the unsteady forced oscillating flow field over HBS, under the basis of Etkin＇s unsteady aerodynamic model.

关 键 词：流体力学 NAVIER-STOKES方程 非定常流动 数值模拟 俯仰阻尼导数 

分 类 号：V211.1[航空宇航科学与技术—航空宇航推进理论与工程]