| 摘要: |
| 为避免或减轻多孔水闸少数孔开启时产生的突扩式三元水跃及次生二次水跃对闸后防冲设施及河道的冲刷破坏，针对平板闸门单孔开启和连续3孔开启情况，在消力池中分别设置4种不同长度导流墙，通过物理模型试验和三维数值模拟研究了相应水跃特性及流速、流态特征。模型比尺采用1∶100，数值模拟采用RNG k-ε紊流模型和VOF方法。结果表明：在连续3孔闸门开启，闸门开度为1 m的试验条件下，导流墙长度为消力池长度的50%, 60%, 75%和100%时与未加导流墙情况相比，跃后水深分别降低了4.16%, 1.66%, 1.94%和2.22%；二次水跃距离分别缩短了17.14%, 14.29%, 2.86%和1.43%。导流墙长度为消力池长度的50%时跃后水深与二次水跃距离降幅最大，海漫上流速分布更加均匀。试验结果可为闸下消能设计和工程运行管理应用提供借鉴和参考。 |
| 关键词: 三元水流 二次水跃 导流墙 数值模拟 流场分析 |
| DOI： |
| 分类号:TV653 |
| 基金项目:河北省水利科研与推广计划项目（2016-63） |
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| Influences of training wall on 3D flow property behind sluice |
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LIANG Xiao, QIE Zhihong, WU Xinmiao, RAN Yanli
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Institute of Urban and Rural Construction, Agricultural University of Hebei, Baoding
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| Abstract: |
| When the multi-hole sluice is opened partially, 3D hydraulic jump and secondary hydraulic jump will occur. In order to avoid or reduce the damages to the anti-scour facilities placed behind the sluice and the river channel, this paper aims at the situations where one and three consecutive holes of the plain gate are open respectively, and four training walls with different lengths are placed at the stilling pool. Studies of relevant characteristics of hydraulic jump, flow pattern and flow velocity are carried out by the hydraulic model tests and 3D numerical simulation. The scale of the hydraulic model is 1∶100, and the numerical simulation adopts the RNG k-ε turbulence model and the VOF method. The research results show that the three consecutive holes are open with the opening of 1m under the conditions of model tests, with the training wall lengths of 0.5, 0.6, 0.75 and 1 times of the length of the stilling pool, compared with the case without training wall; the sequent depth has decreased by 4.16%, 1.66%, 1.94% and 2.22% respectively; and the distance of the secondary hydraulic jump has reduced by 17.14%, 14.29%, 2.86% and 1.43% respectively. The sequent depth and the distance of the secondary hydraulic jump have reduced to the largest degree when a training wall whose length is 0.5 times of the stilling pool is placed in the stilling pool, and the flow velocity is most uniform over the apron in this case. The test results can provide a technical support for the management of engineering operations including energy dissipation by the baffle blocks or the stilling basins located behind the sluice. |
| Key words: 3D flow secondary hydraulic jump training wall numerical simulation flow field analysis |
