嵌套网格粘性流动数值模拟用于风洞洞壁干扰研究

运用嵌套网格技术和Navier Stokes数值模拟对机翼半模和翼身组合体试验时风洞的四壁干扰进行综合模拟、评估和修正。计算格式在空间上采用中心有限体积离散 ,在时间上采用多步Runge Kutta时间步长格式进行积分。计算结果证明了该方法的可行性和优越性。

The application of chimera grid technique and the viscous flow numerical simulation to wind tunnel wall interference study

A numerical analytical method of wind tunnel interference is presented, which simulates the viscous flow around the test model in wind tunnel by solving three dimensional thin layer Renolds averaged Navier Stokes equations using chimera grid technique and Baldwin Lomax turbulent model. In the method, a cell centered finite volume method in space and a five step Runge Kutta hybrid scheme as time matching method are adopted. Baldwin Lomax turbulent model is extended to wing/wind tunnel side wall juncture flow. The wall interference in both the half model test of three dimensional wing and the wing body model test of the aircraft is simulated and corrected. It is verified by the computation that the method presented in this paper is a robust CFD tool for prediction wind tunnel wall interference.