Experimental study on vertical baffles of different configurations in suppressing sloshing pressure
Experimental study on vertical baffles of different configurations in suppressing sloshing pressure
复制标题
不同构型垂直挡板抑制晃动压力的试验研究
DOI：
10.1016/j.oceaneng.2017.03.031
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发表时间：
2017-05
影响因子：
5
通讯作者：
Yuan Xiaoli
中科院分区：
文献类型：
--
作者：
Xue Mi-An;Zheng Jinhai;Lin Pengzhi;Yuan Xiaoli
在较宽的激励频率范围内，对四种折流板的抑压效果进行了实验研究。分别测量了无隔板、底埋式垂直隔板、自由面齐平式垂直隔板、穿孔式垂直隔板和穿孔式垂直隔板的罐壁动态冲击压力沿罐壁中心线的变化以及隔板对不同激励频率的响应。罐壁上的最大冲击压力通常随着压力传感器远离自由表面的距离的减小而增大。在0.4 ω 1~1.4 ω 1的频率范围内，自由表面冲洗比浸入式底置垂直挡板更能有效地降低冲击压力，尤其是在第一阶固有频率附近，穿孔式底置垂直挡板抑制晃荡压力的效果比表面穿透式底置垂直挡板更显著。特别是在高强迫频率区。结果表明，竖直隔板的存在改变了贮液箱的第一阶固有频率。实验结果表明，改变流场和改变固有频率可以有效地抑制罐壁的冲击压力。
The effectiveness of four types of the baffles in suppressing pressure is experimentally investigated under a wide range of forcing frequencies. The dynamic impact pressure variations alongside the central line of the tank wall and the baffle response to different excitation frequencies were measured for tanks without baffles and with immersed bottom-mounted vertical baffles, vertical baffles flushing with free surface, surface-piercing bottom-mounted vertical baffles and perforated vertical baffles, respectively. The maximum impact pressure on the tank wall generally increases with decreasing the distance of the pressure sensor away from the free surface. In the frequency range from 0.4ω1to 1.4ω1, the vertical baffle flushing with free surface is an more effective tool on reducing impact pressure comparing with the immersed bottom-mounted vertical baffle, especially near the first-mode natural frequency, and effects of the perforated vertical baffle in suppressing sloshing pressure is more significant than that of the surface-piercing bottom-mounted vertical baffle, especially in high forcing frequency region. It is found that the first-mode natural frequency of liquid-tank is altered by the vertical baffles. The experimental results show that changing flow fields and altering natural frequency may effectively suppress the impact pressure on the tank walls.
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