论文部分内容阅读
基于Numeca的数值模拟功能,以N-S方程为控制方程,采用Sparlart-Allmaras湍流模型和结构化网格,分别对混流式水轮机有无副叶片情况下长短叶片、活动导叶、固定导叶等过流部件的流场进行三维数值模拟,并利用Numeca自带的后处理模块CFView对比分析了两次模拟结果的速度矢量分布、压力矢量分布和流场状况。结果表明,副叶片可使流场的速度矢量、压力矢量分布更加均衡、过流能力更好、水力效率更高。
Based on the Numeca numerical simulation function, NS equations are used as the governing equations, Sparlart-Allmaras turbulence model and structured grid are used to analyze the flow field of Francis turbines with or without vanes, such as long and short vanes, movable vanes and fixed vanes Components of the flow field for three-dimensional numerical simulation, and use Numeca’s own post-processing module CFView comparative analysis of the two simulation results of velocity vector distribution, pressure vector distribution and flow field conditions. The results show that the auxiliary blades can make the velocity vector and pressure vector distribution of the flow field more balanced, the overcurrent capability is better and the hydraulic efficiency is higher.