Suppressing submerged vortices in a closed pump sump: A novel approach using joint anti-vortex devices

IF 4.3 2区工程技术 Q1 ENGINEERING, OCEAN Applied Ocean Research Pub Date : 2024-09-17 DOI:10.1016/j.apor.2024.104226

Bowen Zhang , Li Cheng , Baoshan Zhu , Weixuan Jiao , Can Luo , Anlong Yang

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引用次数: 0

Abstract

The closed sump is a vital inlet structure for low-head tidal pumping stations in coastal regions. The flow instability caused by roof-attached vortices (RAVs) and floor-attached vortices (FAVs) within the sump significantly affects the reliability of the unit operation. Mitigating and eradicating these detrimental vortices is deemed imperative in the realm of engineering applications. Reducing the sources of vortices, improving operating modes, and adding anti-vortex devices (AVDs) are the general ways to suppress the occurrence of vortices. However, few reports exist on the closed pump sumps' joint vortex elimination methods for RAVs and FAVs. Based on a deep understanding of the dynamic evolution behavior of the RAVs and FAVs, a hybrid RANS-LES numerical prediction method is adopted to comprehensively compare the suppression effects of different AVDs on the vortex structure. An effective "elliptical line anti-vortex cone combined with underwater cover plate" joint anti-vortex device (JAVD) is proposed and verified through model experiments. The research results provide analytical ideas for improving the flow field of the pump sump and optimizing hydraulic design.

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抑制封闭泵槽中的水下涡流：使用联合防涡装置的新方法

封闭式底盘是沿海地区低扬程潮汐泵站的重要入口结构。底盘内的顶附涡流（RAV）和底附涡流（FAV）造成的流动不稳定性严重影响了设备运行的可靠性。在工程应用领域，缓解和消除这些有害涡流被认为是当务之急。减少涡流源、改进运行模式和增加防涡装置 (AVD) 是抑制涡流发生的一般方法。然而，关于 RAV 和 FAV 的闭式泵集水池联合消除涡流方法的报道却很少。在深入理解 RAV 和 FAV 动态演化行为的基础上，采用 RANS-LES 混合数值预测方法综合比较了不同 AVD 对涡流结构的抑制效果。提出了一种有效的 "椭圆线防涡锥与水下盖板相结合 "的联合防涡装置（JAVD），并通过模型试验进行了验证。研究成果为改善泵底壳流场和优化水力设计提供了分析思路。

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来源期刊

Applied Ocean Research 地学-工程：大洋

CiteScore

8.70

自引率

7.00%

发文量

316

审稿时长

59 days

期刊介绍： The aim of Applied Ocean Research is to encourage the submission of papers that advance the state of knowledge in a range of topics relevant to ocean engineering.