摘要
为了满足现代风洞试验精细化要求,提高风洞试验数据精准度,开展跨声速开孔壁洞壁干扰修正方法研究。本文利用实测壁压信息构造开孔壁边界条件,通过求解N-S方程,模拟试验模型在风洞中的绕流场,建立基于壁压信息的跨声速洞壁干扰非线性修正方法。不同于线性修正方法,本方法可用于各种复杂外形飞行器的亚、跨声速开孔壁洞壁干扰修正,结合小展弦比飞翼标模风洞试验数据,对其在FL-2风洞试验数据开展洞壁干扰特性研究。洞壁干扰修正结果表明,洞壁干扰量随马赫数变化呈增长趋势,Ma=1.0左右达最大,经过修正的FL-2风洞的跨声速试验结果,与FL-26风洞近似无干扰试验结果吻合良好。
In order to meet the elaborateness requirements of modern wind tunnel testing and improve the accuracy of wind tunnel test data,the nonlinear method of transonic porous wall interference corrections based on wall pressure is developed.The measured wall pressure information is adopted to construct the porous wall boundary conditions,and the flow field around the test model in the wind tunnel is simulated numerically with the N-S equations.Unlike the linear correction methods,this method can be used for a variety of complex shapes of the aircrafts to correct the porous wall interference in the subsonic or transonic wind tunnel.The characteristics of wall interference corrections is studied combining with test data of the low aspect ratio flying wing model conducted in the FL-2wind tunnel.The results indicate that the wall interference has a rising trend with the Mach number increasing,the interference reaches to the maximum at about Ma=1.0,and the corrected results of the FL-2wind tunnel test data are in good agreement with the test results of the FL-26 wind tunnel approximately without interference.
出处
《空气动力学学报》
CSCD
北大核心
2016年第1期131-137,共7页
Acta Aerodynamica Sinica
关键词
壁压
洞壁干扰
飞翼标模
非线性
wall pressure
wall interference
flying wing
nonlinear method
