Fluid sloshing dynamic performance in a liquid hydrogen tank |
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| Affiliation: | 1. State Key Laboratory for Geomechanics and Deep Underground Engineering, School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou, 221116, China;2. State Key Laboratory of Technologies in Space Cryogenic Propellants, Beijing, 100028, China;3. School of Energy and Power Engineering, Xi''an Jiaotong University, Xi''an, 710049, China;1. School of Energy and Power Engineering, Xi''an Jiaotong University, Xi''an 710049, China;2. State Key Laboratory of Technologies in Space Cryogenic Propellants, Beijing 100028, China;1. Institute of Refrigeration and Cryogenics, Zhejiang University, The Key Laboratory of Refrigeration and Cryogenic Technology of Zhejiang Province, Hangzhou 310027, China;2. China Academy of Launch Vehicle Technology, Beijing 100000, China;1. Graduate School of Maritime Sciences, Kobe University, Kobe, Hyogo 658-0022, Japan;2. Iwatani Corporation, R&D Center, Aamagasaki, Hyogo 661-0965, Japan;3. National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan;1. State Key Laboratory for Geomechanics and Deep Underground Engineering, School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, China;2. School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China;1. School of Astronautics, Beihang University, Beijing 100083, China;2. Beijing Institute of Astronautical Systems Engineering, Beijing 100076, China |
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| Abstract: | In the present study, a numerical model is built to investigate the hydrodynamic performance in a sloshing liquid hydrogen tank under a sinusoidal excitation. The motion mesh coupled the volume of fluid method is adopted to capture the fluctuation of the free surface during sloshing. The sloshing dynamic response of the free surface is specially evaluated. Meanwhile, the sloshing force and moment, and pressure variation are numerically studied. The results show that the free surface has stable interface shapes with “Z” or “S” type profiles in the initial period. As time elapses, the sinusoidal wave propagates, some disturbances occur at the interface with different wave amplitudes. For fluid close to the tank wall, it suffers much more from external excitation with large amplitude fluctuations. For the symmetrically distributed measuring points, opposite fluctuating profiles form with almost the same amplitude. Influenced by fluid motion, the point of the maximum liquid pressure makes fluctuations as well. The measuring points far from the symmetry axis of the tank have severe fluctuating variations. With some valuable conclusions arrived, the present study is significant to the in-depth comprehension on fluid sloshing dynamical behavior in non-isothermal cryogenic tanks. |
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| Keywords: | Dynamic response Fluid sloshing Interface fluctuation Liquid hydrogen tank |
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