高阶精度格式WCNS在三角翼大攻角模拟中的应用研究

采用5阶精度的加权紧致非线性格式(WCNS-E-5)数值模拟了65°三角翼的大攻角绕流流场,主要目的是考核高阶精度格式WCNS在大攻角旋涡流动方面以及跨声速流场的激波附面层干扰、涡破裂位置的模拟能力,重点研究不同网格规模和湍流模型对尖前缘三角翼涡系之间的相互作用的影响。通过求解任意坐标系下的雷诺平均N-S方程,采用5阶精度的加权紧致非线性格式(WCNS-E-5)和多块对接结构网格技术,两种湍流模型分别是一方程SA和两方程SST湍流模型,在与相应试验结果对比的基础上,详细研究了WCNS-E-5格式在跨声速大攻角旋涡流动中的表现,以及不同网格规模、两种湍流模型对主涡二次涡相互作用、涡破裂位置和表面压力分布的影响。本文的研究结果表明,高阶精度格式WCNS-E-5能成功应用于三角翼的跨声速大攻角流动,网格规模的增加进一步提高流场分辨率,SST湍流模型相对SA湍流模型在三角翼大攻角流动中具有更好的适用性。

Application of high-order scheme(WCNS) at high angles of incidence for delta wing

With the help of five order scheme(WCNS-E-5),flow field of 65° delta wing at high angles of incidence is simulated.The research’s target is checking WCNS’s simulative ability for vortex flow at high angles of incidence,shock-boundary interaction and vortex breakdown location;and the paper’s primary research direction is interaction in different number of grid points and different turbulence models for vortex system’s reciprocity which occurred in delta wing with sharp leading edges.It is shown by computational results that the high order scheme WCNS-E-5 could be applied in high angles of incidence transonic flow for delta wing,and the flow field’s resolution could be improved with increasing of number of grid points meanwhile the SST turbulence model has better applicability than SA model in flow at high angles of incidence for delta wing.