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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。
The fifth-order precision weighted nonlinear model (WCNS-E-5) is used to simulate the flow field around the large angle of attack of the 65 ° delta wing. The main purpose of this study is to evaluate the accuracy of WCNS at the high angle of attack As well as the influence of the shock boundary layer interference and the vortex rupture position in the transonic flow field, and the influence of different grid sizes and turbulence models on the interaction of the sharp-edged delta wing vortex system. By solving the Reynolds-averaged Navier-Stokes equations for Navier-Stokes equations in any coordinate system, the WCNS-E-5 weighted weighted nonlinear scheme and the meshing technique with multiple docking structures are used. The two turbulence models are the equations SA and Based on the SST turbulence model and the comparison with the corresponding experimental results, the performance of the WCNS-E-5 scheme in vortex flow at large cross-sonic velocity is studied in detail, and the effects of two turbulence models on the eddy current Vortex interaction, vortex rupture position and surface pressure distribution. The results of this paper show that the WCNS-E-5 high-precision format can be successfully applied to large-angle-of-flight transversal flow of the delta wing. The increase of the grid size further improves the resolution of the flow field. The SST turbulence model is relatively stable with respect to the SA turbulence model. The wing has better applicability in large angle of attack flow.