射流簇底流消能旋涡区脉动压力特性研究

张陆陈; 王余杰; 骆少泽

doi:10.6052/j.issn.1000-4750.2017.05.S016

射流簇底流消能旋涡区脉动压力特性研究

1.
南京水利科学研究院水文水资源与水利工程科学国家重点实验室, 江苏, 南京 210029;
2.
河海大学水利水电学院, 江苏, 南京 210098

基金项目: 国家重点研发计划项目（2016YFC0401901）；国家自然科学基金项目（51409160）

详细信息

作者简介:
王余杰(1993-),男,山西人,硕士生,从事水工水力学研究(E-mail:501355568@qq.com);骆少泽(1965-),男,江苏人,教授级高工,学士,从事水工水力学研究(E-mail:600780@163.com).

通讯作者:
张陆陈(1986-),男,江苏人,高工,博士,从事水工水力学研究(E-mail:110455898@qq.com).

中图分类号: TV135.2
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- 文章访问数: 248
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出版历程
- 收稿日期: 2017-05-23
- 修回日期: 2017-10-31
- 刊出日期: 2018-06-29

Study on votex area fluctuating pressure properties of energy dissipation by hydraulic jump with jet clusters

1.
Nanjing Hydraulic Research Institute State Key Laboratory Of Hydrology-Water Resources and Hydraulic Engineering, Nanjing 210029, China;
2.
College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China

摘要

摘要: 射流簇底流消能流态特征复杂，近壁旋涡可能影响消能安全。通过大比尺模型试验，研究了典型运行方式下各向旋涡区脉动压力特性。结果表明：旋涡区脉动压力可视作平稳的随机过程；纵轴旋涡强度最大、脉动压力系数为0.042~0.081，立轴旋涡强度其次、脉动压力系数为0.029~0.068，横轴旋涡强度最弱、脉动压力系数为0.025~0.063；频域能量特征揭示了水流的脉动主频和旋涡脱落频率，水流脉动主频低于0.5 Hz，立轴旋涡和横轴旋涡频率约2.5 Hz，纵轴旋涡频率为3.5 Hz。
- 水利工程 /
- 射流簇底流消能 /
- 模型试验 /
- 近壁旋涡 /
- 脉动压力 /
- 频域能量特征
Abstract: The flow pattern of energy dissipation by hydraulic jump with jet clusters is very complex, and the near-wall votex may affect energy dissipation security. With large-scale model tests, votex area fluctuating pressure properties under a typical operating mode were studied. The results show that the fluctuating pressure can be regarded as a stationary random process. Longitudinal vortex intensity is the maximum, and the pressure fluctuation coefficient is of 0.042-0.081. Vertical vortex intensity is second, and corresponging pressure fluctuation coefficient is of 0.029-0.068. Horizontal vortex intensity is the minimum, and corresponging pressure fluctuation coefficient is of 0.025-0.063. The energy characteristics in the frequency domain reveal the major frequency of flow fluctuating and vortex frequency. The major frequency of flow fluctuating is lower than 0.5 Hz, the frequency of vertical vortex and horizontal vortex is about 2.5 Hz, and longitudinal vortex frequency is about 3.5 Hz.
- water conservancy project /
- energy dissipation by hydraulic jump with jet clusters /
- model test /
- near-wall votex /
- fluctuating pressure /
- frequency domain energy characteristics

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参考文献(11)

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