Effect of liquid filling level on sloshing hydrodynamic characteristic under the first natural frequency
Effect of liquid filling level on sloshing hydrodynamic characteristic under the first natural frequency
复制标题
液体充注液位对一阶固有频率下晃动水动力特性的影响
DOI：
10.1016/j.est.2022.105452
复制
发表时间：
2022-11
影响因子：
9.4
通讯作者：
Zhan Liu
中科院分区：
文献类型：
--
作者：
Yinan Qiu;Minkai Bai;Yuanliang Liu;Gang Lei;Zhan Liu
氢能是一种很有前景的可再生替代能源，氢存储在世界范围内引起了越来越多的兴趣。液氢在运输过程中，由于动力粘度低，液体晃动是不可避免的。由于流体晃动具有明显的负面影响，因此应详细考虑相应的安全问题。 【摘要】：目的利用流体体积法(VOF)研究低温燃料储罐中流体晃动水动力性能。通过与相关实验结果的比较进行数值模型验证。选择储罐第一固有频率作为外部激励，研究分析初始液位对流体晃动的影响。模拟了不同流体晃动水动力参数，包括晃动力、流体压力、界面面积比和界面波动。研究发现，初始液体充注水平对流体晃动水动力特性有明显影响。晃动流体动力学参数随着液体填充水平的增加而增加。自由界面在第一固有频率的作用下经历明显的波动。而且靠近罐壁的界面监测器位移波动幅度较大。一般来说，位移波动随着初始液体填充水平的增加而增加。本研究对于理解固有频率下流体晃动的流体动力学具有重要意义，可为削弱和抑制大幅流体晃动提供一定的参考。 • 建立热流耦合模型来研究流体晃动水动力性能。 • 采用VOF方法预测流体晃动现象，并结合网格运动处理。 • 初始液位引起严重的流体波动和晃动力明显降低。 • 晃动力的幅度和流体波动的高度都随着初始液体填充液位的增加而增加。
Hydrogen energy is a promising renewable alternative energy and hydrogen storage obtains more interest all over the world. During the transportation of liquid hydrogen, fluid sloshing is inevitable due to low kinetic viscosity. As fluid sloshing has obvious negative effects, the corresponding safety issues should be given detailed considerations. This work aims to study fluid sloshing hydrodynamic performance in a cryogenic fuel storage tank by utilizing volume of fluid (VOF) method. The numerical model validation is conducted by compared with related experimental results. The first natural frequency of the storage tank is selected as external excitation, and influence of initial liquid filling level on fluid sloshing is researched and analyzed. Different fluid sloshing hydrodynamic parameters, including sloshing force, fluid pressure, interface area ratio and interface fluctuation, are simulated. It is found that the initial liquid filling level causes evident influences on fluid sloshing hydrodynamic characteristics. The sloshing hydrodynamic parameters increase with the liquid filling level. The free interface experiences obvious fluctuations subjected to the first natural frequency. Moreover, the interface monitor close to tank wall has large amplitude displacement fluctuations. Generally, the displacement fluctuation increases with the initial liquid filling level. The present work is of significance to understand fluid sloshing hydrodynamics under the natural frequency, and may supply some references to weaken and inhibit large amplitude fluid sloshing. • A thermal-flow coupled model was established to investigate fluid sloshing hydrodynamic performance. • The VOF method was adopted to predict fluid sloshing phenomenon, with the mesh motion treatment coupled. • The initial liquid filling level causes serious fluid fluctuations and obvious reductions on the sloshing force. • Both the amplitude of sloshing force and elevation of fluid fluctuation increase with the initial liquid filling level.
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影响因子：
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作者：
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影响因子：
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