抽水蓄能电站侧式进/出水口局部非稳态现象研究
TV61; 在出流工况下,侧式进/出水口扩散段内水流与边壁易发生分离,产生局部非稳态现象,从而导致进/出水口流态紊乱.采用RNG k-?紊流模型对某抽水蓄能电站进/出水口流场进行三维数值模拟,并通过模型试验验证了数值模拟的合理性.研究结果表明:侧式进/出水口在扩散流时,受扩散角的影响在主流附近存在流动分离区,该区域紊动强度较大,形成局部非稳态现象,紊动强度与流速平方呈线性关系.流道内流速呈现周期性波动,波动周期与雷诺数近似呈幂函数关系.中间流道的波动周期小于边流道,且边中流道流速波动周期的差异与雷诺数呈现正相关.试验中对流速的监测时长应涵盖数个波动周期,才能准确衡量进/出水口的水力学特性....
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| Published in | 中国农村水利水电 no. 2; pp. 129 - 135 |
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| Main Authors | , , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
中国电建集团中南勘测设计研究院有限公司,湖南 长沙 410014%大连理工大学建设工程学院,辽宁 大连 116081
15.02.2025
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1007-2284 |
| DOI | 10.12396/znsd.240966 |
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| Abstract | TV61; 在出流工况下,侧式进/出水口扩散段内水流与边壁易发生分离,产生局部非稳态现象,从而导致进/出水口流态紊乱.采用RNG k-?紊流模型对某抽水蓄能电站进/出水口流场进行三维数值模拟,并通过模型试验验证了数值模拟的合理性.研究结果表明:侧式进/出水口在扩散流时,受扩散角的影响在主流附近存在流动分离区,该区域紊动强度较大,形成局部非稳态现象,紊动强度与流速平方呈线性关系.流道内流速呈现周期性波动,波动周期与雷诺数近似呈幂函数关系.中间流道的波动周期小于边流道,且边中流道流速波动周期的差异与雷诺数呈现正相关.试验中对流速的监测时长应涵盖数个波动周期,才能准确衡量进/出水口的水力学特性. |
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| AbstractList | TV61; 在出流工况下,侧式进/出水口扩散段内水流与边壁易发生分离,产生局部非稳态现象,从而导致进/出水口流态紊乱.采用RNG k-?紊流模型对某抽水蓄能电站进/出水口流场进行三维数值模拟,并通过模型试验验证了数值模拟的合理性.研究结果表明:侧式进/出水口在扩散流时,受扩散角的影响在主流附近存在流动分离区,该区域紊动强度较大,形成局部非稳态现象,紊动强度与流速平方呈线性关系.流道内流速呈现周期性波动,波动周期与雷诺数近似呈幂函数关系.中间流道的波动周期小于边流道,且边中流道流速波动周期的差异与雷诺数呈现正相关.试验中对流速的监测时长应涵盖数个波动周期,才能准确衡量进/出水口的水力学特性. |
| Abstract_FL | In the outflow condition,the water flow in the diffusion section of the side inlet/outlet is prone to be separated from the side wall,resulting in local unsteady state phenomenon,which leads to flow disorder at the inlet/outlet.In this paper,the RNG k-ε turbulence model is used to conduct three-dimensional numerical simulation of the flow field at the inlet/outlet of a pumped storage power station,and the rationality of the numerical simulation is verified by model test.The results show that:when the side inlet/outlet diffuses the flow,there is a flow separation area near the mainstream due to the influence of the diffusion angle.The turbulence intensity in this area is large,resulting in local unsteady state phenomenon.The relationship between turbulence intensity and velocity square is linear.The flow velocity in the channel shows periodic fluctuations,and the fluctuation period is approximately in a power function relationship with the Reynolds number.The fluctuation period of the middle channel is smaller than that of the side channel,and the difference in the fluctuation period of the side channel and the middle channel is positively correlated with the Reynolds number.The monitoring time of the flow velocity in the model test should cover several fluctuation periods,so as to accurately measure the hydraulic characteristics of the inlet/outlet. |
| Author | 王立杰 顾莉 魏杰 郭港归 苗宝广 |
| AuthorAffiliation | 中国电建集团中南勘测设计研究院有限公司,湖南 长沙 410014%大连理工大学建设工程学院,辽宁 大连 116081 |
| AuthorAffiliation_xml | – name: 中国电建集团中南勘测设计研究院有限公司,湖南 长沙 410014%大连理工大学建设工程学院,辽宁 大连 116081 |
| Author_FL | GU Li WEI Jie GUO Gang-gui WANG Li-jie MIAO Bao-guang |
| Author_FL_xml | – sequence: 1 fullname: WEI Jie – sequence: 2 fullname: GUO Gang-gui – sequence: 3 fullname: GU Li – sequence: 4 fullname: WANG Li-jie – sequence: 5 fullname: MIAO Bao-guang |
| Author_xml | – sequence: 1 fullname: 魏杰 – sequence: 2 fullname: 郭港归 – sequence: 3 fullname: 顾莉 – sequence: 4 fullname: 王立杰 – sequence: 5 fullname: 苗宝广 |
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| ClassificationCodes | TV61 |
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| Copyright | Copyright © Wanfang Data Co. Ltd. All Rights Reserved. |
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| DOI | 10.12396/znsd.240966 |
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| DocumentTitle_FL | Research on Local Instability Characteristics of Inlet/Outlet of Side Pumped Storage Power Station |
| EndPage | 135 |
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| Issue | 2 |
| Keywords | 局部非稳态现象 diffusion flow local instability 侧式进/出水口 扩散流 side inlet/outlet 数值模拟 numerical simulation |
| Language | Chinese |
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| PublicationTitle | 中国农村水利水电 |
| PublicationTitle_FL | China Rural Water and Hydropower |
| PublicationYear | 2025 |
| Publisher | 中国电建集团中南勘测设计研究院有限公司,湖南 长沙 410014%大连理工大学建设工程学院,辽宁 大连 116081 |
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| Snippet | TV61; 在出流工况下,侧式进/出水口扩散段内水流与边壁易发生分离,产生局部非稳态现象,从而导致进/出水口流态紊乱.采用RNG... |
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| Title | 抽水蓄能电站侧式进/出水口局部非稳态现象研究 |
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