泄洪洞工作闸门开启时水击数值模拟研究

发布时间：2019-01-26 17:12

【摘要】：泄洪洞工作闸门运行过程中有可能产生水击,目前没有受到重视。应用特征线法数值模拟青海省某水电站泄洪洞工作闸门开启时闸前水击的变化过程,结果表明:(1)工作闸门匀速开启的方式可导致泄洪洞内产生水击,水击产生于闸门开启的初始阶段,水击压强振幅呈对数规律衰减;(2)工作闸门非匀速开启方式对泄洪洞非恒定流有重要影响,闸门开启速度先慢后快的运行方式可有效减小水击压强振幅,降低闸门振动的可能性,工作闸门以适当的加速度开启时可消除水击现象,彻底避免水击引起的闸门振动,排除这种泄洪安全隐患。
[Abstract]:Water hammer may occur during the operation of the working gate of flood discharge tunnel, which has not been paid much attention to at present. The characteristic line method is used to numerically simulate the variation process of water hammer in front of sluice when the working gate of a flood discharge tunnel in Qinghai Province is opened. The results show that: (1) the mode of uniform opening of the working gate can lead to water hammer in the flood discharge tunnel. Water hammer occurs in the initial stage of gate opening, and the amplitude of water hammer pressure attenuates in logarithmic law. (2) the non-uniform opening mode of the working gate has an important influence on the unsteady flow of the flood discharge tunnel. The operation mode of the gate opening speed is slow first and then fast, which can effectively reduce the amplitude of water hammer pressure and reduce the possibility of gate vibration. When the working gate is opened with proper acceleration, the phenomenon of water hammer can be eliminated, the vibration of the gate caused by water hammer can be avoided thoroughly, and the hidden danger of flood discharge safety can be eliminated.
【作者单位】：西北农林科技大学水利与建筑工程学院;
【分类号】：TV663

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