水轮机固定导叶涡街的动力学分析与燕尾修型研究

doi:10.11930/j.issn.1004-9649.2014.11.5.4

中国电力 ›› 2014, Vol. 47 ›› Issue (11): 5-9.DOI: 10.11930/j.issn.1004-9649.2014.11.5.4

水轮机固定导叶涡街的动力学分析与燕尾修型研究

王东, 张思青, 张云龙

昆明理工大学冶金与能源工程学院,云南昆明 650093

收稿日期:2014-07-06 出版日期:2014-11-18 发布日期:2015-12-08
作者简介:王东（1988—）,男,贵州六盘水人,硕士研究生,从事水电站水力机械数值模拟方面的研究。E-mail: kenny7520@163.com
基金资助:
国家自然科学基金项目（51369012）; 云南省教育厅科学研究基金（2012Y546）

The Analysis of Karman Vortex of Hydraulic Turbine Stay Vane Based on Vortex Dynamics and Study of Dovetail Modification

WANG Dong, ZHANG Si-qing, ZHANG Yun-long

Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China

Received:2014-07-06 Online:2014-11-18 Published:2015-12-08
Supported by:
This project is supported by the National Natural Science Foundation of China(51369012) and the Scientific Research Foundation of the Education Department of Yunnan Province (2012Y546)

摘要/Abstract

摘要： 卡门涡的脱落与叶片尾部形状密切相关,为了研究固定导叶燕尾后缘对卡门涡脱落的影响,运用涡动力学理论对固定导叶涡量场进行分析,寻找涡街输运的一般规律;并对混流式水轮机的双列叶栅进行数值模拟,对原型和燕尾型固定导叶尾迹涡量场和压力脉动进行比较。数值计算结果表明：与原型相比,燕尾型固定导叶尾迹的涡量值和压力脉动相对减小。燕尾开叉角起到了延长涡街输运距离的作用,同时限制了新生漩涡的生长空间,降低了涡街能量;燕尾后缘对于卡门涡的脱落具有抑制作用,减弱了卡门涡的破坏能力。

关键词: 水轮机, 固定导叶, 卡门涡, 涡动力学, 燕尾修型

Abstract: The Karman vortex shedding is closely related to the shape of the trailing edge of vane. In order to study the effects of the dovetail trailing edge of stay vanes on vortex shedding, the vorticity field of the stay vane is analyzed in this article to find out the general rules of vortex motion by using vortex dynamics. Numerical simulation of Francis turbine’s tandem cascade is conducted with the vorticity field of the original and dovetail stay vanes and the pressure pulsations are then compared. The simulation results show that in comparison to the original vane, the vorticity value and pressure pulsation of the dovetail stay vane wake are relatively less. The split angle extends the vortex motion distance, limits the growth space of new vortexes and lowers the energy of vortexes. The dovetail trailing edge of the stay vane has an inhibitory effect on vortex shedding, which weakens the damage capability of vortexes.

Key words: hydraulic turbine, stay vane, Karman vortex, vortex dynamics, dovetail modification

中图分类号:

TK730

王东, 张思青, 张云龙. 水轮机固定导叶涡街的动力学分析与燕尾修型研究[J]. 中国电力, 2014, 47(11): 5-9.

WANG Dong, ZHANG Si-qing, ZHANG Yun-long. The Analysis of Karman Vortex of Hydraulic Turbine Stay Vane Based on Vortex Dynamics and Study of Dovetail Modification[J]. Electric Power, 2014, 47(11): 5-9.

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水轮机固定导叶涡街的动力学分析与燕尾修型研究

The Analysis of Karman Vortex of Hydraulic Turbine Stay Vane Based on Vortex Dynamics and Study of Dovetail Modification

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水轮机固定导叶涡街的动力学分析与燕尾修型研究

The Analysis of Karman Vortex of Hydraulic Turbine Stay Vane Based on Vortex Dynamics and Study of Dovetail Modification

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