可逆式水轮机水泵断电变工况研究  

Research on Pump Turbine's Conditions when out of Electricity Supply During Pump Working

作　　者：李仁年[1] 黄祺 李琪飞[1] 韩伟[1] 申建保 

机构地区：[1]兰州理工大学能源与动力工程学院,甘肃兰州730050 [2]甘肃电投炳灵水电开发有限责任公司,甘肃永靖731699 [3]兰州电机有限责任公司,甘肃兰州730050

出　　处：《西华大学学报（自然科学版）》2013年第2期33-36,45,共5页Journal of Xihua University:Natural Science Edition

基　　金：国家自然科学基金项目(51079066)

摘　　要：针对抽水蓄能电站稳定性的要求,利用可逆式水轮机水泵工况断电过程中蜗壳出水边的压力始终保持恒定(水轮机工况的水头)、机组转速连续变化这一规律,在Fluent软件中变换转轮的边界条件设置,达到模拟可逆机水泵断电不同工况点水力变化的目的。计算时采用雷诺时均方程和RNG k-ε湍流模型,压力和速度耦合采用半隐式方法(SIMPLEC)算法。数值实验结果直观地反映了不同工况点叶片表面的压力分布、蜗壳内部的流场漩涡分布、水力损失等,对可逆式水轮机的转轮设计和结构优化有一定的参考价值。The pressure of yielding water on the volute keeps constant （ the head of work condition for the hydraulic generator） and the generator unit continually changes during the transition when electricity goes off at pump working for the pump-turbine. Based on this regular pattern, the rotation set-up of the runner is changed in the software Fluent. And finally, the purpose of imitating the chan- ges of waterpower in the different work conditions during transition stage for the reversible turbine can be realized. The Reynolds Time Averaged Equation and RNG k- e turbulence mode are used in the calculation. The implicit （SIMPLEC） method is employed for the coupling of pressure and velocity. The resuhs directly indicate the pressure distribution along the blade surface, flow-field swirl distri- bution in the volute, and the hydraulic loss at Pump working for the pump-turbine. The results obtained are valuable for runner design and structure optimization of pump-turbines.

关 键 词：可逆式水轮机 数值模拟 结构优化 SIMPLEC算法 

分 类 号：TK734[交通运输工程—轮机工程]