混流式水轮机全流道三维非定常湍流场的动态大涡模拟  

Dynamic Large Eddy Simulation of 3-D Unsteady Turbulent Flow Field through the Whole Flow Passage of the Francis Turbine

作　　者：黄剑峰[1,2] 张立翔[1] 王文全[1] 

机构地区：[1]昆明理工大学工程力学系,昆明650051 [2]云南农业大学水利水电与建筑学院,昆明650201

出　　处：《中国农村水利水电》2009年第1期101-105,108,共6页China Rural Water and Hydropower

基　　金：国家自然科学基金项目(50579025);云南省自然科学基金项目(2007A030M)

摘　　要：基于大涡模拟动态亚格子湍流模型和三维时均N-S方程,应用非结构网格的滑移网格技术,进行了混流式水轮机全流道动静干扰的三维非定常湍流计算。捕捉到了水轮机各过流部件内的流场随时间的变化情况。计算结果表明水轮机中的水流处于复杂的湍流运动状态,随着时间的推移,水轮机内部湍流运动变化剧烈,得到的计算结果更接近实际流场的分布。The unsteady numerical simulation of three dimensional turbulent flow rotor-stator interaction through a Francis turbine is conducted on the basis of 3D N-S equations, dynamic large eddy model and sliding mesh technology. The results show that the detail of flow field and its developing process in the Francis turbine can be predicted well. The results also show that the hydraulic turbine flow is the turbulent flow in a complex state. A violent change takes place in the turbulent flow athletics as time goes on. The calculation results are closer to the actual distribution of the flow field.

关 键 词：混流式水轮机 全流道 CFD 三维非定常湍流计算 大涡模拟 

分 类 号：TK730.2[交通运输工程—轮机工程]