| 徐存东,王荣荣,刘辉,连海东,王燕,王国霞.多泥沙河流侧向进水泵站开机组合对前池流态的影响研究[J].水利学报,2020,51(1):92-101 |
| 多泥沙河流侧向进水泵站开机组合对前池流态的影响研究 |
| Research on the influence of start-up combinations on the flow pattern in forebay of side-inlet pumping station on sandy river |
| 投稿时间：2019-09-16 |
| DOI：10.13243/j.cnki.slxb.20190662 |
| 中文关键词: 侧向进水泵站 前池流态 开机组合 数值模拟 逆向工程 Mixture模型 |
| 英文关键词: side-inlet pumping station water flow pattern of forebay start-up combination numerical simulation reverse engineering Mixture model |
| 基金项目:国家自然科学基金项目（51579102，31360204）；河南省高校科技创新团队支持计划（19IRTSTHN030）；“中原千人计划”—中原科技创新领军人才支持计划（20ZYQR-KJLJ-27）；华北水利水电大学博士研究生创新基金（B2017081503） |
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| 中文摘要: |
| 为探索多泥沙河流侧向进水泵站不同开机组合对泵站前池流态的影响，选取甘肃省景泰川电力提灌工程灌区一期总干三泵站侧向进水前池为典型研究对象，现场取样分析泵站引水含沙情况，利用超声波多普勒流速流向仪对前池流场进行现场实测，同时引入逆向工程技术构建现场淤积状态下进水前池（以下称原位前池）三维几何模型，采用FLUENT软件基于Realizable k-ε湍流模型及Mixture多相流模型对原位前池水流流态进行数值计算，对比分析数值模拟结果与现场测流结果，验证了数值模型的可靠性。在此基础上，分别对10种不同开机组合方案下未淤积状态下的进水前池（以下称原型前池）流态进行了数值模拟分析。研究结果表明：前池外侧边壁及末端存在回流区及泥沙淤积问题，基于逆向工程的原位前池流态数值模拟结果与现场测流结果相吻合；原型前池主流扩散效果不佳，泵站机组对称开启，同时避免两端机组停机尤其是末端机组停机，前池水流流态较好。本文提出的研究思路对泵站前池流态数值模拟研究具有一定的应用价值，研究成果可为类似泵站工程优化设计和优化运行提供参考依据。 |
| 英文摘要: |
| For the purpose of probing into the influence of start-up combinations on the flow pattern in forebay of side-inlet and multi-unit pumping station on sandy river,the side-inlet forebay of #3 Pump Station of Total Trunk Line (Phase I), Gansu Jingtaichuan Irrigation District was taken as the research object, field sampling was used to analyze the sediment content in the forebay, field measurement was carried out on the flow field in the forebay by using the ultrasonic doppler flow velocity flowmeter,and meanwhile, reverse engineering technology was introduced to construct the three-dimensional geometric model of the forebay under the condition of deposition (hereinafter referred to as in-situ forebay). The FLUENT software was used to numerically calculate the water flow pattern of the in-situ forebay on the basis of Realizable k-ε turbulence model and Mixture multiphase flow model,the numerical simulation results and the actual flow measurement results were compared to verify the accuracy of the numerical calculation process. On that basis, the numerical simulation analysis of the water flow pattern in the forebay without siltation (hereinafter referred to as prototype forebay) under 10 different start-up combinations was carried out. The results show that the backflow areas and sedimentation is mainly distributed at the end of the forebay and the outer side wall. The numerical simulation results of flow pattern in the in-situ forebay based on reverse engineering are consistent with the field flow measurement results. The main flow diffusion effect in the prototype forebay is not good, and the flow pattern in the forebay is better when the pump station unit is opened symmetrically, at the same time the units at both ends are avoided to stop, especially the terminal unit. The research idea proposed in this paper has certain application value for the research of numerical simulation about the flow pattern in the forebay of pump station,and the research results will provide reference for the optimizing design and operating of similar pumping station projects. |
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