第40卷2023年第s1期上海航天(中英文)AEROSPACESHANGHAI(CHINESE&ENGLISH)火箭贮箱液体防晃特性数值分析宣传伟,王吉飞,王亚博,刘锦凡,孙阳,张众(上海宇航系统工程研究所,上海201109)摘要:基于计算流体动力学(CFD)仿真对某型火箭液体贮箱3种不同构型防晃装置的防晃特性进行对比研究。采用连续小波变换方法对贮箱晃动阻尼进行了辨识。仿真结果表明:当充液比为50%时,增加半月形防晃板或在十字隔板上打孔(孔的总面积小于十字隔板总面积10%)对液体晃动频率的影响较小(不足10%),但对晃动阻尼影响明显。增加半月形防晃板可将晃动阻尼提高约15%,而在十字隔板上打孔可将晃动阻尼提高约84%。由此说明,隔板打孔在减轻防晃装置重量的同时也具有显著的防晃效果。关键词:液体火箭;数值仿真;液体晃动;阻尼辨识;液体贮箱中图分类号:V475.1文献标志码:ADOI:10.19328/j.cnki.2096⁃8655.2023.s1.007NumericalAnalysisonLiquidSloshingofRocketTanksXUANChuanwei,WANGJifei,WANGYabo,LiuJinfan(AerospaceSystemEngineeringShanghai,Shanghai201109,China)Abstract:BasedonComputationalFluidDynamics(CFD)simulations,acomparativestudywasconductedonliquidsloshingsuppressionofthreedifferentsloshingsuppressionsystemsforaparticulartypeofrocket’sliquidtank.TheContinuousWaveletTransform(CWT)wasappliedtoassessthetanksloshingdampness.Thesimulationindicatedthatwhentheliquidfillratioreached50%,theadditionofasemicircularsloshingsuppressionplateorperforationsonthecross-partition(withatotalperforationareaoflessthan10%ofthecross-partitionarea)performedaminimaleffectontheliquidsloshingfrequency(lessthan10%),andasignificantimpactonthesloshingdampness.Asemicircularsloshingsuppressionplateincreasedthedampnessbyapproximately15%,whileperforationsonthecross-partitionenhancedthedampnessbyapproximately84%.Thesefindingsdemonstratethatthepartition'sperforationreducestheweightofthesloshingsuppressionplateandexhibitsaremarkablesuppressioneffect.Keywords:Liquidrocket;Numericalsimulation;Liquidsloshing;Dampidentification;Liquidtank0引言液体运载火箭所用推进剂(四氧化二氮、偏二甲肼、煤油、液氧、液氢和甲烷等)位于各级贮箱内。火箭飞行中,贮箱内液体受...