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采用全隐式、低耗散E-CUSP格式,通过求解雷诺平均Navier-Stokes方程耦合Spalart-Allmaras(SA)湍流模型,模拟了细长旋成体在超声速、大攻角下的流场,分析了背风面涡的发展过程.结果表明:E-CUSP格式耦合SA湍流模型能够准确地模拟背风面的流动分离和精细的二次涡,对横向分离具有较高的模拟精度;预测的物面压力系数分布和激波位置与实验数据吻合良好,力和力矩的相对误差在1.98%之内;E-CUSP格式可用于模拟复杂的分离流动,具有高的计算精度和效率.
The fully implicit and low-dissipation E-CUSP scheme was used to simulate Spalart-Allmaras (SA) turbulence model by solving the Reynolds-averaged Navier-Stokes equations. The results show that the E-CUSP-coupled SA turbulence model can accurately simulate the flow separation and the fine second-order eddy of the leeward surface with high accuracy for transverse separation. The predicted surface pressure coefficient The distribution and shock location agree well with the experimental data, and the relative error of force and torque is within 1.98%. The E-CUSP format can be used to simulate complex separation flow with high accuracy and efficiency.