CFD simulation of heat transfer and phase change characteristics of the cryogenic liquid hydrogen tank under microgravity conditions

被引:27
作者
Jiang, Yaobin [1 ]
Yu, Yusong [1 ]
Wang, Zheng [1 ]
Zhang, Shurui [1 ]
Cao, Jie [2 ]
机构
[1] Beijing Jiaotong Univ, Sch Mech, Hydrogen Energy & Space Prop Lab HESPL, Elect & Control Engn, Beijing 100044, Peoples R China
[2] China North Engine Res Inst, Tianjin 300400, Peoples R China
关键词
Microgravity; Cryogenic liquid hydrogen; Heat transfer and phase change; Numerical simulation; THERMAL STRATIFICATION; TEMPERATURE STRATIFICATION; HYDRODYNAMIC PERFORMANCE; SELF-PRESSURIZATION; PRESSURE CONTROL; OXYGEN; BAFFLES; FUEL; FLOW;
D O I
10.1016/j.ijhydene.2022.04.006
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The heat transfer and phase change processes of cryogenic liquid hydrogen (LH2) in the tank have an important influence on the working performance of the liquid hydrogen-liquid oxygen storage and supply system of rockets and spacecrafts. In this study, we use the RANS method coupled with Lee model and VOF (volume of fraction) method to solve Navier-stokes equations. The Lee model is adopted to describe the phase change process of liquid hydrogen, and the VOF method is utilized to calculate free surface by solving the advection equation of volume fraction. The model is used to simulate the heat transfer and phase change processes of the cryogenic liquid hydrogen in the storage tank with the different gravitational accelerations, initial temperature, and liquid fill ratios of liquid hydrogen. Numerical results indicate greater gravitational acceleration enhances buoyancy and convection, enhancing convective heat transfer and evaporation processes in the tank. When the acceleration of gravity increases from 10-2 g0 to 10-5 g0, gaseous hydrogen mass increases from 0.0157 kg to 0.0244 kg at 200s. With the increase of initial liquid hydrogen temperature, the heat required to raise the liquid hydrogen to saturation temperature decreases and causes more liquid hydrogen to evaporate and cools the gas hydrogen temperature. More cryogenic liquid hydrogen (i.e., larger the fill ratio) makes the average fluid temperature in the tank lower. A 12.5% reduction in the fill ratio resulted in a decrease in fluid temperature from 20.35 K to 20.15 K (a reduction of about 0.1%, at 200s).(c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:7026 / 7037
页数:12
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