基于流固耦合的某抽水蓄能电站可逆式水轮机转轮强度和模态分析  

Modal Analysis of Reversible Turbine Runner Strength for Pumped Storage Power Station Based on Fluid Solid Coupling

作　　者：岳志伟[1] 郑源[1] 阚阚 陈宇杰[2] 李东阔 臧伟[1] 

机构地区：[1]河海大学能源与电气学院,江苏南京211100 [2]河海大学水利水电学院,江苏南京210098

出　　处：《水电能源科学》2017年第2期181-184,152,共5页Water Resources and Power

基　　金：国家自然科学基金项目(51579080);安徽省自然科学基金项目(1608085ME119);中央高校基本科研业务费专项资金(2015B33814)

摘　　要：以国外某抽水蓄能电站为例,基于Ansys有限元计算平台,利用流固耦合方法研究了电站可逆式水轮机转轮在不同水头下机组流道内的水体对转轮叶片的影响,通过计算预应力和干湿条件下的转轮模态,分析了水体和预应力对转轮振动频率的影响。结果表明,在不同水头水压力作用下,转轮的静应力最大值出现在上冠与叶片相连处,叶片最大变形出现在叶片出水边的中间位置,且随着水头的升高而增大;预应力对转轮模态的影响较小,而水介质因阻尼作用对转轮模态减小效果明显。Taking a certain pumped storage power station abroad for an example,based on the Ansys finite element calculation platform,the method of fluid-solid coupling was used to study the influence of water in runner passageway on the blade under different head working conditions.By calculating the runner modal under the pre-stress condition and the drying and wetting conditions,it analyzed the influence of water and pre-stress on vibration frequency of runner.The results show that under different water head pressure,the location of the biggest static stress of the runner is the connected place between the blades and the crown,the location of the maximum deformation of the blades is the middle position of the outlet edge of the blades,and it increase with the increase of head;the pre-stress makes little effect on the runner modal;however,the water medium can reduce the runner modal because of the damping effect.

关 键 词：可逆式水轮机 转轮 流固耦合 静应力 预应力 湿模态 

分 类 号：TV136.1[水利工程—水力学及河流动力学]