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- 2018
圆柱水箱中水平多孔挡板对液面晃动影响的数值模拟研究
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Abstract:
液体晃动是一种常见的现象，可能造成飞行器失稳、箱体结构损坏、液面监测困难等危害。因此对液体晃动的抑制受到了广泛深入的研究，其中最常用的方法就是在箱体内部布置挡板。基于Darcy定律的多孔介质模型为模拟多孔挡板提供了简单易行的方法，该文在对比实验结果验证数值模拟方法可靠性的基础上，研究了低频大幅晃动条件下水平多孔挡板不同浸没深度对液面晃动的影响，发现了波峰和波谷变化的规律以及在特殊情况下挡板导致波峰高度增加的现象，并对其机理进行了简要分析。挡板的阻碍对液面造成了扰动，导致液面围绕无挡板情况下的液面位置振荡运动，在特定情况下可能会出现更高的波峰，使得液面晃动看起来更加剧烈。
Abstract：Liquid sloshing is a common phenomenon that can cause instabilities in aircraft, can damage the tanks, and can complicate liquid level monitoring. Therefore, sloshing suppression has been extensively studied. The most common method is to arrange baffles in the tanks. The porous media model based on Darcy's law provides a simple method for simulating flows in tanks with porous baffles. In this study, experimental data was used to verify the reliability of numerical simulations used to investigate the influence of various immersion depths of horizontal porous baffles on liquid sloshing for low-frequency, large-amplitude sloshing conditions. The results show that the sloshing crests and troughs change more with higher sloshing crests because of the baffles in some cases. The baffles disturb the liquid surface which make the liquid surface oscillate more than without baffles. Thus, the baffles increasing the liquid sloshing in some cases.
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