排灌机械工程学报2025，Vol.43Issue(3)：284-290,307,8.DOI:10.3969/j.issn.1674-8530.23.0237
混流式水轮机部分负荷运行压力脉动与噪声特性
Pressure pulsation and noise characteristics during partial load operation of Francis turbine
摘要
Abstract
In order to study the pressure pulsation and noise characteristics of hydraulic turbine opera-ting under partial load conditions,numerical simulations of a specific hydraulic turbine model under partial load conditions were conducted using the SST turbulence model in advanced simulation software.The results show that from the volute to the runner outlet in the time domain,the pressure pulsation amplitude is relatively stable within a specific range over time,with the highest amplitude observed in the runner section,and the pressure pulsation amplitude of the draft tube from the inlet to the outlet first increases and subsequently decreases.In the frequency domain analysis,from the volute to the ac-tive guide vane,the position of the predominant frequency is identified at the blade frequency.It is ob-served that the greater the distance from the runner,the smaller the amplitude of the predominant fre-quency,notably,the higher the amplitude of the pressure pulsation frequency on both sides of the run-ner,indicating a significant influence of rotor-stator interaction on pressure pulsation.The noise radia-tion levels and directivity distributions generated by different load conditions are similar in all direc-tions.The distribution law of sound pressure level remains consistent,with the highest sound pressure amplitude around the turbine.As the distance from the turbine increases,the amplitude of sound pres-sure decreases at the field point from the turbine.At the blade frequency,the sound pressure distribu-tion of the noise shows a pronounced dipole characteristic.The positions of the minima and maxima in the directivity distribution of the external field noise under different load conditions are basically the same.The research results offer theoretical support for optimizing the operational technology of hydroe-lectric generator units.关键词
混流式水轮机/数值模拟/部分负荷/压力脉动/噪声特性Key words
Francis turbine/numerical simulation/partial load/pressure pulsation/noise characteristics分类
农业科技引用本文复制引用
夏璞,马建军,袁聪,刘斌,蒋东进,张玉全..混流式水轮机部分负荷运行压力脉动与噪声特性[J].排灌机械工程学报,2025,43(3):284-290,307,8.基金项目
国网福建省电力有限公司科技项目(52130420001F) （52130420001F）
