| 郭苗,黄子豪,江涛,陆冬生,吕朝阳,申艳.抽水蓄能电站事故闸门动应力演化过程分析研究[J].水利学报,2025,56(12):1668-1678 |
| 抽水蓄能电站事故闸门动应力演化过程分析研究 |
| Study on the dynamic stress evolution process of emergency gates in pumped storage power stations during transient operations |
| 投稿时间：2025-07-16 修订日期：2025-12-23 |
| DOI：10.13243/j.cnki.slxb.20250401 |
| 中文关键词: SST k-ω湍流模型 VOF模型 重叠网格 动应力演化 事故闸门 |
| 英文关键词: SST k-ω turbulence model Volume of Fluid model overset grid technology dynamic stress evolution emergency gate |
| 基金项目:国家自然科学基金面上项目（52279084）；中央高校基本科研业务费专项（2024JC003）；中央高校基金项目（2024MS065） |
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| 中文摘要: |
| 抽水蓄能电站事故闸门是电站水力系统的重要组成部分。本文以某抽蓄电站事故闸门为研究对象，联合SST k-ω湍流模型、VOF流体体积模型与重叠网格技术，研究了相同初始水位不同流量工况下闸门动水关闭过程中关键部位的动应力演化过程及其附近复杂流场演变，数值模拟结果与原型实测结果吻合较好，验证了本文提出的数值模型有效性与精确性。研究结果表明：各工况闸门持住力表现为先短暂减小，随后上升至峰顶并在开度e=0.6~0.45之间维持，最后持住力持续减小直至反向；动水关闭过程中，闸门顶部压强持续增大，底缘压强则先减小后增大；各工况闸门底缘压强T随闸门开度减小而下降。不同工况闸门外部流场变化规律类似，较为剧烈的流速、压强梯度变化主要发生在闸门开度e=0.75~0.25之间，各工况气-液相界面演变剧烈但未有携气水流回流闸前的现象发生。本文构建的数值模型可为相关领域动水关闭过程中动应力演化预测研究提供借鉴，研究结果可为抽蓄电站事故闸门的优化设计提供指导。 |
| 英文摘要: |
| The emergency gate is a critical component of the hydraulic system in pumped storage power stations. In this study，the emergency gate of a pumped storage power station was examined using an integrated methodology that incorporates the SST k-ω turbulence model，Volume of Fluid（VOF）model，and overset grid technology. A comprehensive analysis was carried out to examine the dynamic stress evolution in key gate components and the associated flow characteristics during the dynamic closure process under varying discharge conditions with constant initial water levels. Good agreement was achieved between numerical simulations and prototype measurements，thereby verifying both the validity and precision of the established numerical model in this paper. Key observations include：the holding force was initially observed to undergo transient reduction across all operational scenarios，followed by augmentation to maximum values that were maintained within the opening range of e=0.6-0.45，preceding a progressive decline culminating in force reversal. Throughout the dynamic closure process，the gate top pressure demonstrated sustained growth，whereas the bottom edge pressure manifested an initial decline succeeded by a subsequent increase. A consistent reduction in bottom edge pressure（T）was recorded in conjunction with decreasing gate openings for all test conditions. The flow field examination revealed analogous behavioral patterns across different operational cases. Particularly notable velocity and pressure gradient variations were principally detected within the gate opening range of e= 0.75-0.25. While vigorous gas-liquid interface transformations were documented in every instance，no instances of air-entrained fluid backflow toward the gate upstream face were identified. The established numerical model can serve as a reference for predicting the dynamic stress evolution during hydraulic closure events in relevant engineering applications and the research results can provide guidance for the optimal design of emergency gates in pumped storage power stations. |
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