化工学报2025，Vol.76Issue(z1)：217-229,13.DOI:10.11949/0438-1157.20241369
负过载下多孔隔板对液氧贮箱蓄液性能的影响研究
Numerical study on influence of perforated plate on retention performance of liquid oxygen tank under negative gravity
摘要
Abstract
In comparison to single-use launch vehicles,reusable launch vehicles(RLV)are gaining significant attention due to their high efficiency,low cost,and broad application scope.However,their unique flight profiles also subject them to more complex variations in g-loading,such as axial negative gravity experienced by lower stage during specific flight phases,presenting new technical challenges in propellant management.Existing studies highlight the unique advantages of perforated plates in managing propellant under negative gravity.Consequently,this paper explores the liquid retention capabilities of perforated plates from multiple perspectives.The present study focuses on the liquid oxygen(LOX)tank of a typical launch vehicle.A three-dimensional CFD simulation model,based on the volume of fluid(VOF)method,was constructed to capture the gas-liquid interface.Using this model,the LOX flow behavior was simulated under different perforated plate arrangements,different initial liquid conditions and varying negative gravity.The retention effect of perforated plate was analyzed from two perspectives:the upward ejection of LOX and the downward movement of O2 bubbles.The results of this study indicate that perforated plate can effectively prevent LOX upward ejection,reducing the outflow by 95.63%under a-0.20g negative gravity;additionally,the outflow rate of liquid oxygen is positively correlated with the degree of negative gravity.The influence on liquid oxygen outflow is negligible when the liquid level is above or below the perforated plate and remains horizontal;however,when the liquid level is inclined,a rapid and significant outflow of liquid oxygen occurs due to the gas-liquid circulation channels above and below the perforated plate.The submergence speed of gas is influenced by both the morphology of bubbles and the degree of negative gravity.When the propellant fills up to the height of the perforated plate and the vehicle,tilted at 10°,is subjected to a-0.20g negative gravity,the bubbles grow rapidly,reaching an effective submergence speed of 0.317 m/s.This speed exceeds that observed under a-0.40g negative gravity with a horizontal liquid level.Therefore,the arrangement of the perforated plate should comprehensively consider factors such as volume of remaining propellant,rocket gimbal angle,and degree of negative overload.关键词
液氧/负过载/多孔隔板/气体下潜/流体动力学/气液两相流/数值模拟Key words
liquid oxygen/negative gravity/perforated plates/gas submergence/hydrodynamics/gas-liquid flow/numerical simulation分类
能源科技引用本文复制引用
曹庆泰,郭松源,李建强,蒋赞,汪彬,耑锐,吴静怡,杨光..负过载下多孔隔板对液氧贮箱蓄液性能的影响研究[J].化工学报,2025,76(z1):217-229,13.基金项目
国家自然科学基金项目(52276013,51936006) （52276013,51936006）
中央高校基本科研业务费专项资金 （）
