Laser Doppler Velocimetry Test of Flow Characteristics in Draft Tube of Model Pump Turbine

被引：6

作者：

Deng, Wanquan ^{[1
]}

Li, Zhen ^{[1
]}

Ji, Lei ^{[1
]}

Shang, Linmin ^{[1
]}

Liu, Demin ^{[2
]}

Liu, Xiaobing ^{[1
]}

机构：

[1] Xihua Univ, Key Lab Fluid & Power Machinery, Minist Educ, Chengdu 610039, Peoples R China

[2] Res & Testing Ctr Dongfang Elect Machinery, Deyang 618000, Peoples R China

来源：

PROCESSES | 2022年 / 10卷 / 07期

基金：

国家重点研发计划;

关键词：

laser Doppler velocimetry; pump turbine; pressure pulsation; vortex rope; NUMERICAL-SIMULATION; PRESSURE FLUCTUATION;

D O I：

10.3390/pr10071323

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

For Francis pump turbines, the pressure pulsation characteristics of the draft tube are some of the key concerns during the operation of the units. The pressure pulsation characteristics of the draft tube are directly related to the draft tube spiral cavitating vortex rope. In this paper, the velocity distribution in the draft tube of a Francis pump turbine is tested by means of laser Doppler velocimetry. The velocity pulsation was found to be directly related to the pressure pulsation, while the velocity pulsation was also influenced by the cavitation coefficient. The main frequency of the velocity pulsation was close to the main frequency of the pressure pulsation and became larger as the cavitation factor increased.

引用

页数：15

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