【作者】 张飞； 祝宝山； 樊玉林； 徐用良； 刘文杰；

【Author】 ZHANG Fei;ZHU Baoshan;FAN Yulin;XU Yongliang;LIU Wenjie;Technology Center of State Grid Xinyuan Company Ltd.;Department of Energy and Power Engineering, Tsinghua University;Harbin Institute of Large Electrical Machinery;

【机构】 国网新源控股有限公司技术中心； 清华大学能源与动力工程系； 哈尔滨大电机研究所；

【摘要】 模型试验是校核转轮设计成果的重要途径。针对某采用全三维反问题设计方法设计的模型水泵水轮机转轮进行了模型试验,对水轮机工况的效率和压力脉动进行了测试。水轮机工况模型试验表明,换算到标准雷诺数下水轮机工况最高效率为93.09%;当单位转速由大变小、单位流量由小变大的过程中,模型转轮关键测点的压力脉动具有先减小后增大的趋势。机组无叶区压力脉动存在明显的叶片通过频率,基本不受试验台流道系统及其水体的影响;蜗壳进口、锥管和肘管压力脉动信号频谱存在较为明显的类似频率泄露的现象,引起的原因可能是试验台管路及水体激发的固有频率。更多还原

【Abstract】 Model test is an important way to check designed runner. In this literature, efficiency and pressure pulsation of a scaled pump-turbine runner designed by 3 D-reverse method was investigated under turbine runner mode. The test result indicates that the scaled maximum pump-turbine efficiency running at turbine mode is 93.09% on transferring the Renault number to standard value. The pressure pulsation peak-to-peak values of measured point had a trend of decreasing then increasing on unit speed changing from big value to small value and unit discharge changing from small value to big value. The frequency analysis shows that there is blade passing frequency component in vaneless zone pressure, and the frequency components are not interfered by the test rig characteristics. There happens phenomenon of pseudo-frequency-leakage in the frequency anslysis of spiral case inlet pressure, cone tube pressure and elbow tube pressure signals. This may arising from the natural frequencies of test rig, including the inside water.更多还原