【摘要】 根据旋转坐标系下的 Favre平均 NS方程以及旋转条件下的流动特征 ,修改了 B/ L湍流模型 ,并提出了一种旋转条件下出口边界压力分布的给定方法 ,对已有的 NAPA通用湍流计算软件进行了改进和发展 ,并计算了旋转直管中的流动。通过与实验数据的比较 ,文中的计算结果与实验结果吻合较好 ,正确反映了流动特征和物理现象 ,验证了修改后的 NAPA软件的可靠性。更多还原

【Abstract】 Based on frave averanged three dimensional compressible Navier Stokes equations in the rotating frame and the modified Baldwin Lomax algebraic turbulence model, a NAPA software which is widely used is modified and expanded. Using the software a flow field of a rotating rectangle duct is simulated. At the same time, how to fix the distribution of static pressure at the outflow section is derived from the characteristics of rotating flow fields. The numerical results are compared with the experimental data. The comparison shows that they match well. The reliability and the validity of the NAPA software used in simulating the three dimensional turbulent flow in the rotating frame are verified.更多还原