A Study of Incompressible Flow Calculations with Artificial Compressibility

“具有伪兼容性的三维海军-斯托克斯代码，有限差异的隐含形式，高准确性TVD计划和K-e涡轮模型已经开发为弗朗西斯·沃特跑步者的一个例子，即不可压缩流量。”作者已经为高级涡轮投影仪（ATP）开发了三维湍流流计算代码，带有旋转刀片的复杂流方案，该方案可以预测性能和详细的流，包括成功的冲击位置。我们采取明显的有限差异和接近因子化方法，这样就可以获得一个相对较大的时间步长。K-e湍流模型需要两个运输方程来模拟高雷诺数流，而墙函数被用来减少网格点的数目。TVD （Total Variations Diminishing）方案也可在订购中获得最低限度的人工视觉效果自动化.代码开发的结果在这里是合理的比较与实验数据，并且这个模拟可以描述视觉效果的真实影响，因为第二个流将导致旋转。在命令取消计算时间、隐含的方案和靠近表面的墙功能是有效的，因此这个Navier-Stokes代码可以被接受在较小的计算机中，就像工程工作站一样，作为超级计算机。

The three-dimensional Navier-Stokes code with the pseudo-compressibility, the implicit formulation of finite difference, the high accuracy TVD scheme and the Kーe turbulence model has been developed for the Francis water runner as an example of incompressible flow. The authors have already developed the 3-D turbulent flow calculation code for the advanced turboprop (ATP) with compressible flow scheme of the rotating blade, which enables one to predict the performance and the detailed flow including the location of shock successfully.We take the implicit finite difference and approximate factorization method so as to get the comparatively large time step for the time marching. The K-e turbulence model requiring two transporting equations is introduced for simulating the high Reynolds number flow, while the wall function is used to decrease the number of the grid points. The TVD (Total Variations Diminishing) scheme is also available in order to get the converged results adding the minimum artificial viscosity automatically.The results of the code developed here are reasonable comparing with the experimental data, and this simulation can describe the proper influence of the viscosity such as the secondary flow owing to the rotation. In order to decrease the computational time, the implicit scheme and the wall function near the surface are introduced efficiently so that this Navier-Stokes code is acceptable in the small computer like the engineering work station as well as the supercomputer.