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【目的】为明确大寨河-板闸干渠泵站在不同特征水位时侧向进水前池的流态特征，并提出前池流场的调控措施及最低水位时机组的运行方案，【方法】采用水工物理模型试验的方法对泵站引河、前池及开敞式进水池进行了流场测试，分析了有无流态调控措施的前池流场，并探究了最低水位时不同开机方案的前池流场特征。【结果】结果表明：采用非等渐变弧形导流墩的整流措施后，在设计水位、机组全开时前池表层流速分布均匀度均值为85.86%,中层流速分布均匀度均值为88.75%,底层流速分布均匀度均值为85.42%,高速区范围变小，流态效果改善较好。在最低水位时，若机组全部开机，前池流态进一步恶化，机组产生振动，1~#机组的流场恶化最显著且进水池内部出现涡带。【结论】在最低水位时，泵站0.2倍负荷流量时建议开3~#机组，泵站0.4倍负荷流量时建议开3~#和4~#机组，泵站0.6倍负荷流量时建议开2~#、3~#和4~#机组，在最低水位时，为防止1~#机组来流侧翼墙跌水对河道的冲刷，应严禁开1~#机组。
Abstract：[Purpose] In order to clarify the flow characteristics of the lateral inflow forebay of Dazhaihe-Banzha main canal pumping station at different characteristic water levels, and to put forward the control measures of the flow field of the forebay and the operation scheme of the unit at the lowest water level, so as to provide technical reference for the safe, efficient and stable operation of the pumping station unit.[Methods]The method of hydraulic physical model test was used to carry out hydraulic physical model test on the diversion river, forebay and open inlet pool of pumping station. The flow field of forebay with or without flow control measures was analyzed, and the flow field characteristics of forebay with different start-up schemes at the lowest water level were analyzed.[Results]The result showed that after adopting the rectification measures of non-equal gradient arc-shaped diversion piers, the average velocity distribution uniformity of the surface layer of the forebay with the full opening of the unit at the design water level was 85.86%, the average velocity distribution uniformity of the middle layer was 88.75%, and the average velocity distribution uniformity of the bottom layer was 85.42%. The high-speed area became smaller and the flow pattern improved better. At the lowest water level, if the unit is fully started, the flow pattern of the forebay is further deteriorated, and the unit vibrates. The flow field of the 1 ~# unit deteriorates most significantly and the vortex band inside the intake pool.[Conclusion]At the lowest water level, it is recommended to open 3~# unit when the pump station is 0.2 times the load flow. When the pump station is 0.4 times the load flow, it is recommended to open 3~# and 4~# units, and the pump station is 0.6 times the load.
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基本信息:
DOI：10.13928/j.cnki.wrahe.2025.S2.074
中图分类号:TV675
引用信息:
[1]徐鹏飞,刘景禹,郭瑞,等.大寨河-板闸干渠泵站前池的流态调控及运行方案试验分析[J].水利水电技术(中英文),2025,56(S2):446-452.DOI:10.13928/j.cnki.wrahe.2025.S2.074.
基金信息:
国家自然科学基金项目(51609210); 江苏省水利科技项目(2022010); 江苏省高校自然科学研究重大项目(20KJA570001)