Finally , the analysis examples were presented combined with some real data from hydroelectric set , they showed that numerical simulation of fluid - solid coupling for vibration in this paper is more available and the natural frequency of guide vane in water is lower than that of in air 运用ansys有限元软件计算了水轮机导叶在空气中的振动特性以及液固耦合振动的频率和振型,并对二者进行比较,分析了影响振动的因素。通过算例表明,所采用的有限元数值模型合理,计算结果正确。
In fact , the outlet flow of vane in the hydroelectric set is non - uniform flow for a variety of possible reasons . the flow is unsteady flow relative to vane and blade , and it is the main factor that affect self - excited vibration and dynamic characteristic of guide vane and hydraulic - turbine , which affect directly the power set to run safely and stably 非均匀来流相对于导叶、叶片必然是一种非定常流。这种非定常流造成导叶和转轮叶片的激振,是产生导叶和叶片动应力,改变它们频率的最主要因素,而导叶和叶片的动力特性直接影响水轮机的稳定性。
By using harika algorithm , the characteristic of a high - pressure compressor is calculated at different installation angle of the inlet guide vane and the stator vanes ; the characteristics of a high - pressure turbine and a low - pressure turbine are simulated at different installation angles of the guide vane based on ainley method 本文用harika算法计算了导流叶片和静子叶片安装角度可调的变几何高压压气机特性;用ainley法计算了涡轮导向器面积可调的高压涡轮和低压涡轮的特性。
The main research outcomes were as follows : ( 1 ) the paper applied quasi - three dimensional design model and optimization design model based on si flow surface that was effected by runner ( impeller ) and guide vane jointly . the vortex flow , blade thickness limitation and runner ( impeller ) blade force functions were taken into account . the paper got the improved runners of hl240 type , which were runner hlx240d and runner hlx240e 主要成果有: ( 1 )应用考虑转轮来流有旋、叶片有限厚及转轮(叶轮)叶片力作用的转轮(叶轮)与导叶联合作用的基于s _ 1流面的准三维设计模型和优化设计模型,研究出了hl240的改进型转轮: hlx240d和hlx240e 。
The pressure existing between the guide vane and the runner when the pump - turbine of east china tongbai pumped storage power station stops at different loads is analyzed , and the method for determining the best load at which the generator circuit breaker ( gcb ) switches off during operation of the pump - turbine is illuminated 摘要介绍华东桐柏抽水蓄能电站的水泵运行时,不同负荷工况下停机、导叶和转轮间压力的变化,阐述了华东桐柏抽水蓄能电站1号机组发电机断路器开断的最佳负荷值选定。