非线性气体振荡整流效应在矩形机翼上的应用研究  

Influence of nonlinear gas oscillations on rectangular wings

作　　者：孙建红[1] 李其畅[2] 刘俊志[2] 

机构地区：[1]南京航空航天大学航空宇航学院,江苏南京210016 [2]中国空气动力研究与发展中心,四川绵阳621000

出　　处：《实验流体力学》2005年第1期17-21,34,共6页Journal of Experiments in Fluid Mechanics

摘　　要：在对圆管内气体的非线性振荡进行理论和实验研究的基础上,利用开口圆管非线性气体振荡的整流效应,通过流动显示及压力测量,对翼面分离流控制进行实验研究。研究结果表明,翼面开缝引入气体振荡有利于改善大迎角下翼面的压力分布,提高升力,增大机翼的稳定性,同时,不论采取何种开缝模式,这种输入能量的方式对提高其气动性能都有一定作用。According to those investigations of the forced nonlinear gas oscillation in pipe tubes, an application of rectification (streaming effects) has been paid more attention to in this paper through two slots. The flow separation under the effect of streaming was studied by flow visualization and experimental measurements. The visualization results showed there is a pair of vortex along wing under the effect of gas oscillation. Meanwhile, the section pressure distribution, lift coefficients and moment coefficiens were measured for a 2-D rectangular wing with the airfoil of NACA0012 of 1200mm long and 400mm wide. The result predicts it is helpful to increase the lift and to improve the aerodynamic characteristics of aircraft by using gas oscillation, and is valuable to utilize the streaming effects to control separation flow on the wing surface.

关 键 词：管流 非线性振荡 整流效应 分离流 流动显示 矩形机翼 空气动力学 

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]