球头钝锥高超声速动稳定性的实验研究  

INVESTIGATION OF HYPERSONIC DYNAMIC STABILITY DERIVATIVES OF 8 DEG BLUNT CONE

作　　者：马家骧 陈素贞[1] 许国斌 潘文欣[1] 

机构地区：[1]中国科学院力学研究所

出　　处：《气动实验与测量控制》1995年第3期33-39,共7页

摘　　要：本文叙述在脉冲型高超声速风洞中，用模型自由飞方法测定８°球头钝锥的高超声速静、动稳定特性。采用同步高速摄影方法记录了２０ｍｓ准定常试验时间中模型的角运动并用参数微分法进行气动参数辨识。实验结果表明对质心位置Ｘｃｇ≤０．６０的模型在Ｍ∞＝７．８和Ｍ∞＝９．９两种条件下皆是静、动稳定的，稳定性随质心的后移而下降，在实验范围内马赫数对稳定性没有明显影响，同时模型的底部是否封闭也没有明显影响。Hypersonic static and dynamic stability derivatives of 8den blunt cones with different nose top were investigated by free flightmethod in a hypersonic impulse type wind tunnel. The angular motion of the models during the quasi-steady flow was recorded by synchroflash and the aerodynamic stability coefficients were derived from the motions by parameter differential method. The experimental results show that the models with relative mass center Xcg≤0.6 are static and dynamic stable both in Mach number 7.8 and 9.9 and the stability derivatives vary with the position of 'lass center. The results also show the model base with orwithout a sealed plate has little or no influence on stabilitics in the experimental conditions.

关 键 词：高超声速 动稳定性 球头钝锥 风洞 飞行力学 

分 类 号：V212.121[航空宇航科学与技术—航空宇航推进理论与工程]