期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：240
期号：8
页码：1-9
DOI：10.1088/1755-1315/240/8/082011
出版社：IOP Publishing
摘要：In the present paper, influences of load variations on the pressure fluctuations especially in the vaneless space of a prototype reversible pump turbine are experimentally investigated in generating mode. Original pressure data obtained through on-site measurement are further analyzed in both time and frequency domains in order to show the propagation mechanism of the pressure fluctuations. Our work reveals that the dominant characteristic frequency is the blade passing frequency (BPF, f*=1) between 52% and 90% partial loads and its harmonics (f*=2) between 90% and 100% of rated power, respectively. Detailed results are analyzed and discussed with the aid of several typical demonstrating figures in the present paper.
