排灌机械工程学报2011，Vol.29Issue(4)：287-291,5.DOI:10.3969/j.issn.1674-8530.2011.04.003
叶片形状对能量回收水力透平性能的影响
Effect of vane profile on hydraulic energy recovery turbines performance
摘要
Abstract
Taking 3 hydraulic energy recovery turbines as objects,three types of vane profiles of turbine runners with different blade inlet angles and wrap angles were designed while other hydraulic geome trical parameters and rotational speed fixed. Numerical simulations were carried out for turbines by computational fluid dynamics software Fluent. The simulation results show that the vortex in turbine runner vane profile 1 is weak, the relative velocity and pressure distribution of turbine runner vane profile 1 are more accordant than that of turbine runner vane profile 2 and 3 ,and turbine runner vane profile 3 is the worst at the best efficiency point. Its best efficiency of turbine runner vane profile 1 is 1% and 2% better than that of turbine runner vane profile 2 and 3 approximately. The head and efficiency relationship of these three turbine runners are H2 > H3 > H1 η1 > η2 > η3 at smaller flow rate, while H2 >H1 >H3,η3 > η2 >η1 at larger flow rate. The results also show that there is a combina tion of the optimal blade inlet angle and wrap angle while other hydraulic geometrical parameters fixed. There exists relative eddy at turbine runner inlet near the pressure surface. The head of turbine runner vane profile 3 is low under the same flow rate. Larger the blade wrap angle is,lower the turbines effi ciency is at larger flow rate.关键词
能量回收水力透平/透平轮/叶型/叶片进口角/包角Key words
hydraulic energy recovery turbines/turbine runners/vane profile/blade inlet angle/ wrap angle分类
农业科技引用本文复制引用
杨军虎,王晓晖..叶片形状对能量回收水力透平性能的影响[J].排灌机械工程学报,2011,29(4):287-291,5.基金项目
“十一五”国家科技支撑计划项目(2008BAF34B10) （2008BAF34B10）
浙江省科技计划项目(2009C31145) （2009C31145）
