A calibrated CFD model is built to investigate the influence of slosh baffles on the pressurization performance in liquid hydrogen (LH₂) tank. The calibrated CFD model is proven to have great predictive ability by compared against the flight experimental results. The pressure increase, thermal stratification and wall heat transfer coefficient of LH₂ tank have been detailedly studied. The results indicate that slosh baffles have a great influence on tank pressure increase, fluid temperature distribution and wall heat transfer. Owning to the existence of baffles, the stratification thickness increases gradually with the distance from tank axis to tank wall. While for the tank without baffles, the stratification thickness decreases firstly and then increases with the increase of the distance from the axis. The “M” type stratified thickness distribution presents in tank without baffles. One modified heat transfer coefficient correlation has been proposed with the change of fluid temperature considered by multiplying a temperature correction factor. It has been proven that the average relative prediction errors of heat transfer coefficient reduced from 19.08% to 4.98% for the wet tank wall of the tank, from 8.93% to 4.27% for the dry tank wall, respectively, calculated by the modified correlation.

建立了校准的CFD模型，以研究晃动挡板对液氢（LH ₂）罐中增压性能的影响。与飞行实验结果相比，校准后的CFD模型具有很好的预测能力。LH ₂的压力增加，热分层和壁传热系数坦克已经进行了详细的研究。结果表明，防溢板对储罐压力增加，流体温度分布和壁传热有很大影响。由于挡板的存在，分层厚度随着罐轴线到罐壁的距离而逐渐增加。对于没有挡板的储罐，分层厚度首先减小，然后随着距轴心距离的增加而增加。M型分层厚度分布出现在没有挡板的储罐中。已经提出了一种修正的传热系数相关性，其中考虑了通过乘以温度校正因子来考虑流体温度的变化。事实证明，传热系数的平均相对预测误差从19.08％降低至4。