2、omputationalfluiddynamics,CFD)数值计算;通过试验数据与计算结果的对比分析预开导叶后水泵水轮机S特性及其压力脉动特征。CFD计算结果及模型试验数据表明,预开导叶的方法能有效解决水泵水轮机S特性问题,但是预开导叶后,飞逸工况下的单位流量变大,造成转轮内的流动轴对称特性较差,导致机组的脉动加大,尾水管压力脉动幅值较大,运行稳定性较差,所以通过预开导叶的方法来改善S特性仍然存在弊端。关键词:水泵水轮机S特性预开导叶压力脉动中图分类号:TV136Analysis of SCharacte
3、risticsandItsPressurePulsation of Pumpturbine underPreopening GuideVanes1121XIAO Ruofu SUN Hui LIU Weichao WANG Fujun (1. Collegeof Water Resources and Civil Engineering, China Agricultural University, Beijing100083; 2. Dongfang Electric MachineryCo., Ltd.
4、, Deyang618000)Abstract:Duetothe growingenvironmentalawarenessanddemandingforthebalancingpowerandfrequencycontrol,therenewable energysourcesreversible pumpturbine seemtohave the both characteristics ofpowergeneration andenergystorage.Whilethe Pumpturbineop
5、erates intheScharacteristics, thedifficultyinloadingrejectionprocess andunusualincreaseinwaterpressurewilloccur,which due tothe machinevibration.In ordertoexplorethepreopeningguide vane on theimprovementoftheS characteristics ofpumpturbine.Firstly,usesthes
6、ynchronization guidevaneandpreopeningguidevanetodotheenergytestandthewholeflowofCFDnumericalflow;Secondly,bycomparingtheexperimentaldata with theCFDresultstoanalysis theScharacteristicsand its pressurepulsation;Thenconcluded that:bypreopeningpartguidevanes
7、thepumpturbine canavoidtheinfluenceofthe S characteristicunderthesteadyflow.Whileafterpreopeningguide vanes,the increaseofunitflowinthe runwaycondition destroyed thesymmetryofthe flowinthe runner,which due tothe increaseofthe pressure pulsation and the uns