设计参数对幂次乘波体纵向静稳定性的影响  

Effect of Design Parameters on Longitudinal Static Stability of Power-Law Waverider

作　　者：王晓朋[1] 张陈安[2] 刘文 王发民[2] 叶正寅[1] WANG Xiao-peng;ZHANG Chen-an;LIU Wen;WANG Fa-min;YE Zheng-yin(National Key Laboratory of Aerodynamic Design and Research, Northwestern Polytechnical University, Xi’an 710072, China;State Key Laboratory of High-Temperature Gas Dynamics, Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190, China)

机构地区：[1]西北工业大学翼型叶栅空气动力学国防科技重点实验室,西安710072 [2]中国科学院力学研究所高温气体动力学国家重点实验室,北京100190

出　　处：《宇航学报》2019年第8期887-896,共10页Journal of Astronautics

基　　金：中国科学院战略性先导专项资助(XDA17030100)

摘　　要：为实现幂次乘波体的纵向静稳定设计,对幂次体激波面后流线的"凹凸"特性与设计参数之间的关系进行了研究,并以此为依据,通过数值计算的方法得到了设计参数与幂次乘波体纵向静稳定性之间的关系。结果表明:幂次体激波面后的流线由"内凹"和"外凸"两部分组成;设计参数c越大、n越小、设计Ma越大、前缘点布置的越靠前以及乘波体长度L越长,流线的"外凸"段所占比例越大,由此得到的幂次乘波体纵向也就越稳定;此外,在其他设计参数确定的情形下,前缘线形状的改变并不影响乘波体的纵向静稳定性。The longitudinal static stability of waverider is closely related to the streamline feature of the lower surface.The relationship between the design parameters and the "concave " and "convex " characteristic of the streamlines is studied. The results show that due to the effect of the shock compression and wall expansion,the streamlines behind the shock plane compose of two parts,the "inner concave"part and the "outer convex"one. The design parameters c,n,Ma,L and the position of the leading edge point will affect the"concave"and"convex"characteristic and the longitudinal static stability of the power-law waverider evidently. When the parameter c is larger,the parameter n is smaller,the parameter Ma is greater,and the parameter L is longer,or the leading edge point is closer to the head of the basic flow field,the " inner concave" part of the streamline will be shorter and the longitudinal static stability will be better. In addition,the shape of the leading edge will not influence the longitudinal static stability of the power-law waverider if other design parameters are determined.

关 键 词：纵向静稳定性 幂次乘波体 高超声速滑翔飞行器 

分 类 号：V411.3[航空宇航科学与技术—航空宇航推进理论与工程]