【摘要】 为了准确模拟非定常粘性分离流动,该文采用了三点五阶精度高分辨率广义紧致格式,对来流马赫数为0.5、雷诺数为106时负攻角、零攻角、正攻角等多种工况下平面压气机叶栅内部流场进行了数值模拟,得到了叶片压力面与吸力面上的压力分布以及它们随攻角的变化。数值解与风洞实验结果吻合得较好,表明使用雷诺平均Navier-Stokes方程加Baldwin-Lomax湍流模式来数值模拟平面叶栅中的非定常流动是一种可行的方法,三点五阶精度高分辨率广义紧致格式能够在较少的网格点上求解完全的N-S方程的条件下较为准确地模拟涡脱落现象。更多还原

【Abstract】 The flow field in a plane compressor cascade with negatives, zero and positive angles of attack was simulated numerically for a Mach number of 0.5 and a Reynolds number of 106 using a highresolution threepoint fifthorder accurate generalized compact scheme to accurately simulate the unsteady viscous flow. The timeaveraged pressure distribution on both the pressure and the sunction surfaces was obtained for various angles of attack. The numerical results agree well with measurements in a wind tunnel experiment. The agreement shows the effectiveness of the numerical simulation of separated flow using a combination of the Reynolds averaged NavierStokes equations and the BaldwinLomax turbulence model. The highresolution numerical scheme can simulate the vortex shedding phenomenon while solving the NavierStokes equations on relatively coarse grids.更多还原