Abstract In this paper, the close process of contra-motion check valve in countercurrent pressure difference is studied in nuclear power plant experimental circuit. The transient mathematical model is established. Through the dynamic grid technique, transient flow field in different conditions of valve closing are calculated, and dynamic properties of valve head closing process is analyzed. Through the CFD transient analysis, inherent damping principle and inhibition of water hammer principle are revealed. By writing water hammer analysis, the inhibitation ability of water hammer in typical six conditions is analyzed. At last the performance verification experiments show that contra-motion check valve can effectively inhibit water hammer in the process of parallel double pump switching transition.

中文翻译：

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基于逆向止回阀的并联泵切换时的水锤分析

摘要 本文研究了核电站实验回路中逆流压差下逆向止回阀的关闭过程。建立瞬态数学模型。通过动态网格技术，计算了不同阀门关闭工况下的瞬态流场，分析了阀门关闭过程的动态特性。通过CFD瞬态分析，揭示了固有阻尼原理和抑制水锤原理。通过编写水锤分析，分析了典型六种工况下水锤的抑制能力。最后通过性能验证实验表明，逆向止回阀能有效抑制并联双泵切换过渡过程中的水锤现象。