大型水电站通仓型进水口水力特性研究

发布时间：2018-05-04 22:40

本文选题：大型水电站 + 通仓型进水口　；参考：《水力发电学报》2017年01期

【摘要】：为研究通仓型进水口水力特性,探讨水电站最佳运行方案,结合某实际工程,建立了全三维水动力数学模型,并同步开展了大比尺物理模型实验,计算结果与实验结果进行了相互验证。对不同运行工况下通仓型进水口流速及水头损失等开展研究,结果表明:叠梁门顶流速分布受机组运行影响显著;与常规分层取水进水口相比,最大过栅流速降幅可达60%以上;分层取水进水口采用通仓型布置,其水头损失最大降幅达到50%左右。从水力特性出发,采用通仓型进水结构是降低进水口过栅流速,减小水头损失的有效办法,同时建议采用对称原则确定运行方案。
[Abstract]:In order to study the hydraulic characteristics of the water inlet and discuss the optimal operation scheme of the hydropower station, a full three-dimensional hydrodynamic mathematical model was established in combination with a practical project, and a large scale physical model experiment was carried out simultaneously. The calculated results are verified with the experimental results. The velocity and head loss of the silo type inlet under different operating conditions are studied. The results show that the velocity distribution at the top of the laminated gate is significantly affected by the operation of the unit, and the maximum velocity over the gate can be reduced by more than 60% compared with the conventional stratified intake. The delamination intake adopts the silo type arrangement, and its water head loss decreases by about 50%. Based on the hydraulic characteristics, adopting the silo type inlet structure is an effective method to reduce the flow velocity and the head loss at the inlet. At the same time, it is suggested that the operation scheme should be determined by the principle of symmetry.
【作者单位】：中国水利水电科学研究院流域水循环模拟及调控国家重点实验室;四川大学水力学与山区河流开发保护国家重点实验室;中国长江三峡集团公司;
【基金】：国家自然科学基金(51309256;51409181)
【分类号】：TV135

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