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Flow condition identification and discharge calibration for submerged radial gates

机译：淹没径向门的流量识别和放电校准

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摘要

Accurate prediction of the discharge through radial gates is difficult. Existing calibration methods typically provide sufficient accuracy for free flows and submerged flows with jet Froude number at vena contracta larger than 1.7. However, their predictions are poor for submerged flows with jet Froude number less than 1.7. Based on the analysis of experimental data collected by the US Bureau of Reclamation, an empirical indicator was proposed to predict the approximate range of jet Froude number for submerged flows. Accordingly, submerged flows were subdivided into partially submerged flows with fully developed hydraulic jump, and totally submerged flows with undular or no jump. A new discharge calibration method, referred to as the identification method, was developed for the three distinct flow conditions. Verification of the proposed method indicated the discharge prediction accuracies were significantly improved for totally submerged flows.
机译：通过径向栅极对放电的精确预测是困难的。 现有校准方法通常为自由流动提供足够的准确性，并在大于1.7的VENA Contracta的喷射FRoude号码中淹没流动。 然而，他们的预测对于淹没的流量，喷射FRoude号小于1.7的淹没流量差。 基于美国垦委会收集的实验数据分析，提出了一种经验指标，以预测淹没流动的近似射流数量的近似范围。 因此，用完全开发的液压跳跃，浸没流量被细分为部分浸没的流动，并完全潜水流过向下或没有跳跃。 为三个不同的流动条件开发了一种新的排放校准方法，称为识别方法。 验证所提出的方法表明，对于完全浸没的流动，显着改善了放电预测精度。

著录项

  • 来源
    《Journal of hydraulic research》 |2021年第4期|683-690|共8页
  • 作者

    Guo Yong-Xin; Guo Xin-Lei; Wang Yi-Sen; Wang Tao; Fu Hui; Li Jia-Zhen;

  • 作者单位

    China Inst Water Resources & Hydropower Res State Key Lab Simulat & Regulat Water Cycle River Beijing Peoples R China;

    China Inst Water Resources & Hydropower Res State Key Lab Simulat & Regulat Water Cycle River Engn Beijing Peoples R China;

    Construct Comm South To North Water Divers State Engn Beijing Peoples R China;

    China Inst Water Resources & Hydropower Res State Key Lab Simulat & Regulat Water Cycle River Engn Beijing Peoples R China;

    China Inst Water Resources & Hydropower Res State Key Lab Simulat & Regulat Water Cycle River Beijing Peoples R China;

    China Inst Water Resources & Hydropower Res State Key Lab Simulat & Regulat Water Cycle River Beijing Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Discharge coefficient; discharge measurement; flow condition; hydraulic jump; radial gate; submerged flow;

    机译：放电系数;放电测量;流动条件;液压跳;径向门;淹没流动;

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