非定常自由流中的翼面动态压力测量  

Dynamic pressure measurements on a delta wing in unsteady free stream

作　　者：史志伟[1] 宾斌[1] 李甘牛[1] 明晓[1] 

机构地区：[1]南京航空航天大学航空宇航学院,南京210016

出　　处：《实验流体力学》2004年第4期83-87,共5页Journal of Experiments in Fluid Mechanics

基　　金：教育部博士点基金资助项目(20020287006)

摘　　要：首先讨论了用埋测压管方式进行动态压力测量的可行性,然后利用这一方法对置于非定常自由流中的60°三角翼进行了动态压力测量。结果表明,一定管长和管径的测压管可以用于低频压力脉动的测量。动态测压结果表明,在减速过程中,负压系数增大;在加速过程中,负压系数减小;不同迎角下的压力分布曲线有很大差别。这主要是由于随着来流速度的改变,前缘涡的强度和结构发生变化造成的。来流速度的脉动幅值对压力分布也有很大影响,脉动幅值越大压力分布曲线变化越大。In this paper the feasibility of using the tubing to measure dynamic pressures is discussed. Then the dynamic pressure distributions on a 60° delta wing in unsteady free stream are measured. The results show that it is feasible to test low frequency oscillating pressures using the tubing. The results of dynamic pressure measurements show that pressure coefficients are increased when the free stream decelerated. But the distributions of dynamic pressure at different angle of attacks are different greatly. The reason is that the intensity and the structure of the leading edge vortex are changed with velocity in unsteady free stream. The free stream oscillating amplitudes also effect on the pressure distributions.

关 键 词：三角翼 压力测量 非定常自由流 

分 类 号：V211.7[航空宇航科学与技术—航空宇航推进理论与工程]