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利用自行设计的专门实验设备,对脉动压力在缝隙中的传播规律进行了实验研究。结果表明,1)缝隙内水体流动系受进口边界条件控制的流动;2)缝隙末端开口时,缝隙中脉动压力振幅沿程减小;3)缝隙末端封闭时,缝隙内脉动压力振幅沿程增加;4)缝隙中的脉动压力在传播过程中均出现倍频放大现象。
Using the special experimental equipment designed by ourselves, the propagation of pulsating pressure in the gap was experimentally studied. The results show that: 1) the flow of water in the gap is controlled by the inlet boundary conditions; 2) the amplitude of the fluctuating pressure decreases along the gap at the end of the gap; and 3) the amplitude of the fluctuating pressure in the gap increases with the end of the gap closed ; 4) The ripple pressure in the gap appears doubled amplification during the propagation.