Prediction on the pressure pulsation induced by the free surface vortex based on experimental investigation and Biot-Savart Law
Prediction on the pressure pulsation induced by the free surface vortex based on experimental investigation and Biot-Savart Law
复制标题
基于实验研究和毕奥-萨伐尔定律的自由表面涡引起的压力脉动预测
DOI：
10.1016/j.oceaneng.2022.110934
复制
发表时间：
2022-03
影响因子：
5
通讯作者：
Zhengwei Wang
中科院分区：
文献类型：
--
作者：
Xijie Song;Liu Chao;Zhengwei Wang
自由表面涡是泵站和水电站中的一种不利现象。本文的目的是研究FSV引起的压力脉动。首先，基于毕-萨定律建立了线性涡激压力脉动的理论模型，该模型随时间呈三角函数形式周期性变化。利用高速摄影机拍摄了FSV的演化过程，将其分为起始、发展、延续、崩溃和消失五个阶段。FSV在发展、延续和塌陷阶段发展为吸气涡旋。在持续阶段，FSV持续吸入，规模最大，对机组危害最大。分析表明，FSV符合线性涡特征。通过理论分析和模型试验，得出FSV引起的压力脉动包括两部分：诱导频率为2.32-2.48Hz的吸气扰动引起的压力脉动和诱导频率为5.62- 5.83Hz的吸气扰动引起的压力脉动。FSV引起的压力脉动是一种低频脉动，容易引起机组共振。该研究为研究自由表面涡引起的压力脉动提供了新的依据。
Free surface vortex (FSV) is a negative phenomenon in pump stations and hydropower stations. The purpose of this paper is to investigate the pressure pulsation induced by FSV. Firstly, a theoretical model of linear vortex-induced pressure pulsation was established based on Biot-Savart Law, which changes periodically with time in the form of trigonometric function. A high-speed camera is used to obtain the evolution process of FSV, which is divided into five stages: inception, development, continuance, collapse and disappearance. In the stages of development, continuance and collapse, FSV develops into an inspiratory vortex. In the continuance stage, FSV continues to inhale, with the largest scale and the most harmful to the unit. The analysis shows that FSV conforms to the linear vortex characteristics. According to theoretical analysis and model experiments, the pressure pulsation induced by FSV includes two parts: the induced pressure pulsation by rotating-disturbances with induced frequency in 2.32–2.48Hz and the pressure pulsation induced by inspiratory-disturbances with induced frequency in 5.62–5.83 Hz. The pressure pulsation induced by FSV is a low-frequency pulsation, which can easily induce resonance of the unit. The study offers a new basis on the pressure pulsation induced by the free surface vortex.
登录
查看更多内容
影响因子：
4.6
作者：
Xiangrui Dong;G. Dong;Chaoqun Liu
通讯作者：
Xiangrui Dong;G. Dong;Chaoqun Liu
DOI：
10.1080/19942060.2014.11015507
发表时间：
2014-01
影响因子：
6.1
作者：
A. Škerlavaj;L. Skerget;J. Ravnik;A. Lipej
通讯作者：
A. Škerlavaj;L. Skerget;J. Ravnik;A. Lipej
影响因子：
2.4
作者：
P. Pennings;J. Westerweel;T. V. Terwisga
通讯作者：
P. Pennings;J. Westerweel;T. V. Terwisga
影响因子：
2.5
作者：
Xinlei Zhang;Jin-Long Wu;O. Coutier-Delgosha;Heng Xiao
通讯作者：
Xinlei Zhang;Jin-Long Wu;O. Coutier-Delgosha;Heng Xiao
影响因子：
2.5
作者：
Jin Jiang;Yanhui Li;Chong-yan Pei;Lin-lin Li;You Fu;Hong-gui Cheng;Qiang-qiang Sun
通讯作者：
Jin Jiang;Yanhui Li;Chong-yan Pei;Lin-lin Li;You Fu;Hong-gui Cheng;Qiang-qiang Sun