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水力发电学报 ›› 2025, Vol. 44 ›› Issue (6): 22-31.doi: 10.11660/slfdxb.20250603

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高位水池动态耦合影响下的泵站前池涌浪分析

  

  • 出版日期:2025-06-25 发布日期:2025-06-25

Analysis of surges in pump station forebay under the influence of dynamic coupling of high water pool

  • Online:2025-06-25 Published:2025-06-25

摘要: 水力过渡过程中泵站前池最高涌浪决定了前池的设计顶高程,最低涌浪决定了前池的设计底高程。若设计不当,将出现前池溢流或拉空现象。确定前池涌浪极值,对保障输水工程的安全运行具有重要意义。本文针对描述长距离供水系统泵站前池涌浪变化的非线性动力方程,基于KBM法推导了前池涌浪极值的显式计算公式。同时,利用数值计算验证了显式计算公式的精度,并对精度进行了敏感性分析。研究结果表明,最高涌浪显式计算式与MOC数值仿真结果的相对误差在1%以内,最低涌浪显式计算式与MOC数值仿真结果的相对误差在2.5%以内,且形式简单,便于工程设计采用。

关键词: 高位水池, 泵站前池, KBM渐进法, 涌浪极值, 供水系统

Abstract: During hydraulic transition, the highest water level in a pump station forebay determines its design top elevation, and the lowest determines its design bottom elevation. If the designs are not correct, it will overflow or be empty. Determining its extreme water levels is crucial to ensuring the station’s safe operation for the water supply project. Based on the KBM method, this paper derives explicit formulas for calculating the forebay’s extreme water levels through solving a nonlinear dynamic equation that describes the variations in its water level in a long-distance water supply system. We verify the accuracy of these formulas using numerical calculations, and conduct a sensitivity analysis. The results show that relative to the MOC numerical simulations, the error is less than 1.0% for the highest level formula, and less than 2.5% for the lowest level formula. These formulas have simple forms and are convenient for engineering design.

Key words: high water pool, pump station forebay, KBM asymptotic method, extreme water levels, water supply system

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