内流道对高超声速飞行器动态特性影响分析  

Numerical Analysis on Dynamic Characteristics of Hypersonic Vehicle with Integrated Intake

作　　者：万千 乔宇航 赵飞[1] 石泳[1] WAN Qian;QIAO Yu-hang;ZHAO Fei;SHI Yong(Institute of Manned Space System Engineering,China Academy of Space Technology,Beijing 100094,China)

机构地区：[1]中国空间技术研究院载人航天总体部,北京100094

出　　处：《航空计算技术》2020年第5期31-34,38,共5页Aeronautical Computing Technique

基　　金：国家自然科学基金项目资助(11802015)。

摘　　要：采用数值模拟的方法针对典型吸气式高超声速内外流一体化飞行器X-43A开展了动态特性研究。对动态特性的研究方法采用强迫振动法,非定常流场的时间推进采用双时间步的LU-SGS方法。针对飞行器内流道堵塞与通流两种状态以及内流道对整机动态特性的影响进行了分析。基于X-43A飞行器与飞马座助推器分离之后的弹道实测数据,对进气道堵罩分离前后的整机动态稳定性与机动性变化进行了分析。研究结果表明,X-43A飞行器在内流道堵塞与通流两种不同状态下俯仰通道均处于动稳定状态。在马赫7飞行过程中,飞行器动稳定性在堵罩分离之前减小,堵罩分离之后动稳定性增大。In this paper,numerical method was used to analyze the dynamic characteristics of typical air-breathing hypersonic vehicle with integrated intake system,X-43A.The dynamic derivatives were evaluated using forced vibration method,where the unsteady flow was calculated using the dual-time-step method based on LU-SGS scheme.Firstly,intake with closed and open cowl were calculated respectively,where the influence of the internal flow channel to the dynamic characteristics of the vehicle was discussed.Further,after the separation of Pegasus booster,the dynamic stability of the vehicle before and after the cowl opened were analyzed based on the actual trajectory data of X-43A Mach 7 flight.Results showed that the vehicle with open and closed cowl are both dynamically stable on pitch channel.Moreover,during the Mach 7 flight,the dynamic stability of the X-43A vehicle decreased just before the cowl opened,then increased after the cowl was separated.

关 键 词：高超声速飞行器 内外流一体化 数值模拟 动态特性 强迫振动 

分 类 号：V211[航空宇航科学与技术—航空宇航推进理论与工程]