泄洪洞工作閘門開啟時(shí)水擊數(shù)值模擬研究
[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.
【作者單位】: 西北農(nóng)林科技大學(xué)水利與建筑工程學(xué)院;
【分類號(hào)】:TV663
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