跨声速风洞模型试验非线性洞壁干扰修正方法研究

INVESTIGATION ON NONLINEAR WALLINTERFERENCE CORRECTION FOR MODELTESTS IN TRANSONIC WIND TUNNEL

简要介绍了ＣＡＲＤＣ高速所结合风洞试验和ＣＦＤ两种手段，发展的跨声速三维非线性洞壁干扰修正方法。该方法采用Ｅｕｌｅｒ方程和Ｎ－Ｓ方程模拟模型的绕流场，以实测的跨声速透气壁附近的压力分布作为风洞流场的边界条件，数值求解模型的风洞流场和自由流场，由两者之差得到洞壁干扰对模型气动力的影响。通过流场可视化软件可直观方便地分析洞壁干扰对跨声速模型绕流的影响。该方法已应用于七个模型在几种不同风洞试验段中的跨声速洞壁干扰修正，结果令人满意。

This paper briefly describes a nonlinear three dimensional transonic wall interference correction method,developed in High Speed Aerodynamics Institute of CARDC by combining wind tunnel test and CFD.In this method,flow field over the model is simulated by Euler and NS equations,the measured pressure distributions near the transonic ventilated walls are used as the boundary conditions of tunnel flow field,and the differences between tunnel flow field and free flow field over the model which are numerically solved are taken as wall effects.Influences of wall interference on the structure of transonic flow field over the model can be directly and conveniently analyzed.This method has been applied to transonic wall interference correction for seven models in various test sections,and the results are satisfactory.