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应用新型 L U隐式格式和改良型高阶 MU SCLTVD格式 ,通过求解全三维可压缩 Reynolds平均的Navier- Stokes方程和 q-ω低 Re双方程湍流模型 ,对一种透平叶栅在 - 6 0°到 +35°攻角范围内的流动进行了计算。对不同攻角下叶栅内的三维流动结构进行了细致的分析。计算表明 ,该方法不仅可以准确地捕捉叶轮机械内部流动中出现的激波与边界层、激波与尾迹相互干扰等流动现象 ,而且也适用精确模拟不同工况下 ,特别是大攻角工况下带有分离流和强二次流情况下叶轮机械内部更加复杂的流动。
By using the new LU implicit scheme and the improved high-order MU SCLTVD scheme, a Navier-Stokes equation and a q-ω low Re dual-equation turbulence model are solved for all three-dimensional compressible Reynolds. ° to + 35 ° angle of attack was calculated. The three-dimensional flow structures in cascades at different angles of attack are analyzed in detail. The calculation shows that this method not only can accurately capture the flow phenomena such as shock wave and boundary layer, shock wave and wake interaction, but also can accurately simulate the flow field under different working conditions, especially at high angle of attack Under the flow with a separate flow and strong secondary flow impeller more complicated internal flow.