| 尹辉,蔡宝柱,郑铁刚.典型工程叠梁门分层取水方案优化分析[J].中国水利水电科学研究院学报,2022,20(4):369-376 |
| 典型工程叠梁门分层取水方案优化分析 |
| Optimization analysis of selective water withdrawal with stop log gate in typical engineering projects |
| 投稿时间：2021-05-21 |
| DOI：10.13244/j.cnki.jiwhr.20210127 |
| 中文关键词: 生态环境 分层取水 叠梁门 取水高程 取水水温 |
| 英文关键词:ecological environment selective water withdrawal stop log gate intake elevation water temperature discharged |
| 基金项目: |
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| 摘要点击次数: 582 |
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| 中文摘要: |
| 水库下泄低温水将影响库区下游水生生态系统，而采用叠梁门分层取水则是解决电站引起的下泄水温问题的有效手段。依托实际工程，本研究建立了三维水温-水动力数学模型，对进水口水力特性与下泄水温进行了数值模拟，分别论证了不同取水高程条件下叠梁门分层取水运行的可行性及下游取水水温规律，分析了分层取水对下游灌区作物的影响。结果表明：叠梁门取水高程是影响分层取水效果的关键因素，而取水高程的确定又与进水口水动力特性密不可分，相比于叠梁门门顶水头，中小型工程进水口结构体型对分层取水进水口系统水动力特性影响更甚；增大叠梁门与门库前置墙间距是改善进水口水力特性的有效措施之一；结合叠梁门分层取水水力特性及取水效果，提出了叠梁门运行方式。 |
| 英文摘要: |
| The low-temperature water discharged from the reservoir will affect the downstream aquatic ecosystem of a reservoir area, and using selective water withdrawal with stop log gate is an effective method to solve the problem caused by the low-temperature water discharged from a reservoir. Based on actual engineering projects, this study established a three-dimensional water temperature-hydrodynamic mathematical model, and numerically simulated the hydraulic characteristics and the temperature of water discharged. The operation feasibility of the selective water withdrawal and the temperature of the discharged water under different water intake elevation conditions were demonstrated respectively. In addition, the impact on crops in the downstream irrigation area was also analyzed. The results show that, the water intake head above the stop log gate is the key factor affecting the effect of selective water withdrawal, and the determination of water intake head is closely related to the hydrodynamic characteristics in the intake chamber. Compared with the water intake head, the influence of intake structure shape on the hydrodynamic characteristics is more serious in small and medium-sized projects. From the results, it could be concluded that, increasing the distance between the stop log gate and the front wall of the door chamber is one of the effective measures to improve the hydraulic characteristics of the water intake system. In view of the hydraulic characteristics and water temperature withdrawn, the operation mode of the stop log gate is proposed. |
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