大振幅强迫俯仰振动下的钝锥体动态特性数值研究  

Numerical Investigation of Dynamic Characteristics of Blunt Cone in Large-amplitude Under the Conditions of Force-pitching Vibration

作　　者：粟长江[1] 陈丽辉[1] 杨小亮[1] 刘伟[1] 

机构地区：[1]国防科学技术大学航天与材料工程学院,长沙410073

出　　处：《弹道学报》2010年第1期53-56,共4页Journal of Ballistics

基　　金：国家973项目(2009CB723800;61351);国家自然科学基金项目(90716015)

摘　　要：为研究高超声速弹道导弹外形(HBS)在大振幅条件下的动态运动特性,采用空间二阶精度的NND格式和含双时间步法的AF-ADI隐式时间方法离散非定常N-S方程,数值模拟了HBS标模以不同振幅、频率强迫俯仰运动的非定常流场.模拟得到了大振幅强迫振动HBS外形下的气动力/力矩特性以及非定常运动的流场显示,结果表明,大振幅俯仰运动条件下HBS标模的气动力/力矩具有迟滞特性,并受到俯仰振动幅度和频率的影响.In order to study the dynamic characteristics of Hyper Ballistic Shape(HBS) with large amplitude force-pitching,the second-order NND spatial scheme and the AF-ADI method with dual time step were employed for discrete of unsteady N-S equations,and the flow-field of HBS with force-pitching under several amplitudes and frequencies were simulated.Dynamic characteristics of aerodynamics and moment as well as visualization of unsteady flow-field,were achieved.The results show that the aerodynamics/moment of HBS u...

关 键 词：高超声速 弹道导弹 数值模拟 非定常流动 强迫振动 

分 类 号：TJ761.3[兵器科学与技术—武器系统与运用工程]