郑铁刚,孙双科,柳海涛,王岑,李广宁.叠梁门分层取水水温-水动力动态过程模拟及分析[J].水利学报,2020,51(3):305-314 |
叠梁门分层取水水温-水动力动态过程模拟及分析 |
Simulation and analysis of dynamic process on the temperature dynamics through selective withdrawal intake |
投稿时间:2019-11-04 |
DOI:10.13243/j.cnki.slxb.20190773 |
中文关键词: 叠梁门 分层取水 动态模拟 水温-水动力 取水层 |
英文关键词: stop-log gate selective withdrawal dynamic grid simulation temperature dynamics withdrawal zone |
基金项目:国家重点研发计划项目(2016YFC0401708);中国水利水电科学研究院基本科研业务费专项(HY0145B162019) |
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中文摘要: |
水温分层作为影响库区水生生态系统的重要因素逐渐成为研究热点。为全面了解叠梁门运行方案改变对取水近区水温-水动力及取水层的影响,进一步优化叠梁门运行调度,本文结合动网格模拟技术对叠梁门运行调度过程进行了模拟,并结合物理模型试验对计算结果进行了验证,分析探讨了水温-水动力耦合作用机理及取水层范围和厚度变化规律等。分析表明:数值模拟方法可行,计算结果可信;分层取水最大流速发生在取水底高程以上15 m左右;相比取水流量,取水高程是影响取水层内流速及水温分布的主要因素;相同边界条件下,随取水水头的增加,上部取水层厚度逐渐增加,下部取水层厚度呈现先增大后减小的现象;取水层厚度与叠梁门顶的流速分布、水温分布及水深有关。 |
英文摘要: |
Water temperature stratification,as an important factor affecting aquatic ecosystem in reservoir area,has gradually become a research hotspot. In order to fully understand the influence on the water temperature dynamics and the withdrawal zone through selective withdrawal intake, the dynamic grid simulation technology was used to simulate the operation scheduling process with selective withdrawal in present paper, and verified the calculation results with the physical model test. The results will provide a technical support for further optimizing the operation of the selective withdrawal. The analysis shows that the numerical simulation method is feasible and the calculation results are reliable. The maximum velocity of selective withdrawal intake occurs about 15m above the bottom elevation of water intake. Compared with the intake flow, the intake elevation is the main factor affecting the velocity and water temperature distribution in the withdrawal zone. Under the same boundary, with the increase of the water head, the upper withdrawal zone gradually increases, and the lower withdrawal zone first increases and then decreases. It is also indicated that the withdrawal zone is related to the velocity distribution, water temperature distribution and water depth of the top of the Stop-Log Gate. |
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