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针对活动导叶开度对水泵水轮机泵工况导叶区流场和模型性能的影响,在高精度模型通用试验台上对一低比转速模型水泵水轮机导叶区的流场运用粒子图像测速(PIV)系统进行了测量。测量结果显示,同一开度下随着流量减小,无叶区内的流速出现增大的趋势;同一流量随着开度的减小,导叶前流速明显增大,模型效率下降。模型试验在转轮无空化条件下进行,但在8 mm开度83%最优流量工况,由于流速高、冲角大,造成位于高压侧的导叶头部发生了明显的绕流空化现象,并引起了固定导叶流道宽频带的压力脉动。研究成果可为水泵水轮机的优化设计和安全稳定运行提供试验依据。
Abstract：Aiming at the influence of guide vane opening on the flow field in the guide vane region under pumping mode of pump-turbine, the flow field in the guide vane region of a low specific speed model pump-turbine is measured with the system of Particle Imaging Velocimetry(PIV) on a high precision conventional model experiment platform. The measuring result shows that the flow velocity within the vaneless region increases along with the decrease of the flow rate under the condition that mo-cavitation occwrred on therunner. However, cavitation was found on the heed of the qwid vane wnder 8 mm opening when the flow rate is 83% of the optimal flow rate. The caritation was caused by high flow velocity and large angle of attack to the guide vane, and leads to broadband pressure pulsation in the flow passage of the stay vane. The study result can provide an experimental basis for the optimal design as well as the safe and stable operation of pump-turbine.
[1] 中国电机工程学会.2017年中国电机工程学会专题技术报告[R].北京:中国电机工程学会,2017.
[2] 梅祖彦.抽水蓄能技术[M].北京:清华大学出版社,1999.
[3] 赵永智,刘德民,荀洪运.基于CFD分析的水泵水轮机活动导叶优化设计[J].东方电气评论,2016,30(119):46- 50.
[4] 陈元林,覃大清.导叶双列叶栅CFD数值计算及结果分析方法研究[J].大电机技术,2013(4):38- 41.
[5] 纪兴英,刘胜柱.混流式水轮机导叶水力矩的计算[J].大电机技术,2008(3):38- 41.
[6] SUNY K,ZUO Z G,LIU S H,et al.IOP Conference Series:Earth and Environmental Science 15[C]// Beijing:IOP Publishing,2012.
[7] 王乐勤,刘锦涛,张乐福,等.活动导叶开度对水泵水轮机泵工况的影响研究[J].水力发电学报,2012,31(2):222- 227.
[8] 朱迪,肖若富,陶然,等.水泵水轮机泵工况非设计工况流态与压力脉动分析[J].农业机械学报,2016,47(12):77- 84.
[9] 范宝春,叶经方.瞬态流场参数测量[M].哈尔滨:哈尔滨工程大学出版社,2007.
[10] KRAUSE N,ZAHRINGER K,PAP E.Time-Resolved Particle Imaging Velocimetry for the Investigation of Rotating Stall in a Radial Pump[J].Experiments in Fluids,2005,39(2):192- 201.
[11] FENG J,BENRA F,DOHMEN H.Unsteady Flow Visualization at Part-Load Conditions of a Radial Diffuser Pump:by PIV and CFD[J].Journal of Visualization,2009,12(1):65- 72.
[12] 孙自祥.离心泵叶轮内部粘性流动分块隐式数值计算和PIV实验量测研究[D].北京:清华大学,1994.
[13] 杨华,刘超,汤方平,等.采用PIV研究离心泵转轮内部瞬态流场[J].水动力学研究与进展,2002,17(5):547- 552.
[14] 马皓晨,丁荣,杨东升.低比转数离心泵驼峰现象的PIV测试[J].排灌机械工程学报,2013,31(12):1056- 1060.
[15] GUGGENBERGER M,SENN F,JABERG H,et al.IOP Conference Series:Earth and Environmental Science 49[C]//Beijing:IOP Publishing,2016.
基本信息:
DOI：10.13928/j.cnki.wrahe.2020.01.014
中图分类号:TV734
引用信息:
[1]薛鹏,刘之平,陆力,等.导叶开度对水泵水轮机泵工况导叶区流场影响的试验研究[J],2020,51(01):123-129.DOI:10.13928/j.cnki.wrahe.2020.01.014.
基金信息:
中国水科院科研专项(HM0145B432016)