Abstract：Based on a design procedure for low specific speed Francis runners, three kinds of blades with different blade angles at high pressure end are generated while the rest parameter remain unchanged. The steady, three-dimensional turbulent flows in the pump-turbines with those blades are simulated by means of CFD method at five flow rates to identify the effects of the blade angle on the performance in pump and turbine modes and the inflow condition in the turbine mode as well as the rotor-stator interaction in the pump mode. It is proven that the predicted angle of attack is different from the angle prescribed in the design and the runner is subject to a negative angle of attack in the turbine mode, which results in a remarked shock loss and a slight efficiency reduction but the flow in the runner seems little affected. In the pump mode, the larger the blade angle is, the smaller the rotational angle of the guide vanes is. The hydraulic efficiency is the highest in that mode with blade angle 2, which matches the 14? rotational angle of the guide vane and the stay vane. However, the other two kinds of blade angles mismatch the guide vane and the stay vane, causing instable phenomena, such as shock, reverse flow and flow separation and so on, and leading to a serious declination in the hydraulic efficiency.
阮辉, 廖伟丽, 赵亚萍, 罗兴锜. 叶片高压边安放角对高水头水泵水轮机性能的影响[J]. 排灌机械工程学报, 2015, 33(3): 220-225.
Ruan Hui, Liao Weili, Zhao Yaping, Luo Xingqi. Effects of blade angle at high pressure end on performance of pump-turbine with high head. Journal of Drainage and Irrigation Machinery Engin, 2015, 33(3): 220-225.
[1]刘杰.可逆式水泵水轮机技术及在中国的经验[J].水电站机电技术,2008,31(1):4-9. Liu Jie. Reversible pump turbine technology and expe-rience in China[J]. Mechanical & Electrical Technique of Hydropower Station, 2008,31(1):4-9.(in Chinese)[2]井田富夫(日本).尺寸及形状的制作误差对混流式水轮机和混流式水泵水轮机性能的影响[J].王丽珠,译.国外大电机,1999(4):62-70. Jin Tianfuhu. Effects of size and shape manufacture error on Francis turbine and pump turbine performance[J]. Wang Lizhu,translate. Guowai Dadianji, 1999(4):62-70.(in Chinese)[3]木本裕(日本).高速水泵水轮机转轮叶片数的优化研究[J].吕彤丹,译.国外大电机,2003(3):59-63. Mu Benyu. Optimization research on the blade number of high speed pump turbine [J]. Lü Tongdan,translate. Guowai Dadianji, 2003(3):59-63.(in Chinese)[4]杨孙圣,孔繁余,陈斌.叶片包角对可逆式泵性能影响的数值研究[J].流体机械,2011,39(6):17-20. Yang Sunsheng, Kong Fanyu, Chen Bin. Numerical research of blade wrap angle on the performance of reversible pump[J].Fluid Machinery, 2011,39(6):17-20.(in Chinese)[5]徐用良,冉红娟,陈元林,等.转轮几何参数对水泵水轮机水力性能影响的几点体会[J].大电机技术,2011(3):47-49. Xu Yongliang, Ran Hongjuan, Chen Yuanlin,et al.Some realizations about the influence of geometry para-meters on the hydraulic characteristics of pump-turbine[J].Large Electric Machine and Hydraulic Turbine, 2011(3):47-49.(in Chinese)[6]潘中永,谢蓉,曹英杰,等.叶片安放角变化规律对离心泵性能影响分析[J].排灌机械,2009,27(5):319-322. Pan Zhongyong, Xie Rong, Cao Yingjie, et al. Analysis effects of blade angle on centrifugal pump performance[J]. Drainage and Irrigation Machinery, 2009,27(5):319-322.(in Chinese)[7]张洪安,张洪延.水泵叶轮出口安放角与功率关系的分析研究[J].黑龙江电力,2008,30(4):257-259. Zhang Hongan, Zhang Hongyan. Study on relationship between outlet installation angle of water pump impeller and power[J]. Heilongjiang Electric Power, 2008,30(4):257-259.(in Chinese)[8]严建华,腾国荣,朱方能,等.叶片出口安放角对离心泵内流场影响的研究[J].制造业信息化,2014(1):58-59. Yan Jianhua, Teng Guorong, Zhu Fangneng, et al. Effects of blade outlet angles on the internal flow of centrifugal pump[J]. Manufacturing Informatization, 2014(1):58-59.(in Chinese)[9]谈明高,刘厚林,袁寿其,等.离心泵出口角对能量性能影响的CFD研究[J].中国农村水利水电,2008(11):104-106. Tan Minggao, Liu Houlin, Yuan Shouqi, et al. CFD research on the effect of centrifugal pump outlet angles on the characteristics of energy[J]. China Rural Water and Hydropower, 2008(11):104-106.(in Chinese)[10]阮辉,廖伟丽,赵亚萍,等. 叶片安放角分布规律对冷却塔用混流式水轮机转轮性能的影响研究[J].水力发电学报,2014,33(3):274-278. Ruan Hui, Liao Weili, Zhao Yaping, et al. Effects of blade angle distributions on Francis turbine performance used in cooling tower[J]. Journal of Hydroelectric Engineering, 2014,33(3):274-278.(in Chinese)[11]梅祖彦.抽水蓄能发电技术[M].北京:机械工业出版社,2000:108-109.[12]刘大恺.水轮机[M].3版. 北京: 中国水利水电出版社,2008:40-42.[13]何川,郭立君. 泵与风机[M]. 4版. 北京: 中国电力出版社,2008:65-66.
