作　　者： (齐继贺）;

机构地区： 河南省水利水电学校,河南周口466001

出　　处： 《水资源与水工程学报》 2017年第3期168-172,共5页

摘　　要： 应用ANSYS等相关软件对混流式水轮机进行全流道非定常数值模拟,分析了在偏工况下低流量的3种随开度不断变化的工况,模拟由部分负荷区到高部分负荷区的尾水管涡带及压力脉动的变化情况。应用CFD数值模拟,观察到尾水管随导叶不同开度变化时,尾水管涡带由双螺旋涡带到单螺旋涡带至柱状涡带的变化过程,并分析了相应工况之间的压力脉动频率及脉动幅值的变化规律。这对尾水管压力脉动产生机理的深入研究有着十分重要的意义。 The unsteady numerical simulation of francis turbine was conducted with the application of ANSYS software in this study.Three partial opening changing conditions were analyzed under low flow conditions, and the change of pressure fluctuation by the partial load zone to draft tube vortex high part load zone was simulated.With the application of CFD numerical simulation, it is observed that with the change of the guide vane opening, the tail pipe vortex changed from double helical vortex to single helical vortex and columnar vortex, and the variation law of pressure fluctuation frequency and pulsating amplitude between the corresponding working conditions were analyzed, which is very important to study the mechanism of the pressure pulsation of the draft tube.

关 键 词： 混流式水轮机 导叶开度 尾水管涡带 压力脉动 螺旋涡 柱状涡 数值模拟