2023年第1期总第251期低温工程CRYOGENICSNo.12023SumNo.251过冷液氧增压排液过程数值模拟研究陈虹1高旭1王向南2张中恩2夏明波3谢军龙3陈建业3(1航天低温推进剂技术国家重点实验室北京100028)(2西昌卫星发射中心西昌615606)(3华中科技大学能源与动力工程学院武汉430074)摘要:为探究大容积贮箱中过冷液氧增压排液过程的热力学特性,基于流体体积法(VOF)和蒸发冷凝模型,构建了过冷液氧排出过程的数值模型。采用文献的实验数据验证了数值模型的准确性,并开展了变流量进气增压排液过程的罐内流场特性分析。研究结果表明,过冷液氧排出过程蒸发冷凝对气枕压降影响显著,采用变流量进气增压的方案能够较好地保持气枕压力稳定,使得气枕压力在3%以内波动。排液过程中,过冷液氧先升温明显,增压随着排液进行,贮箱气枕区域会出现涡状流,气体温度在水平方向有一定波动。关键词:低温液体火箭液氧增压排出数值模拟稳压特性中图分类号:V433,TB66文献标识码:A文章编号:1000-6516(2023)01-0020-06收稿日期:2022-10-26;修订日期:2023-02-09基金项目:低温推进剂国家重点实验室基础研究课题(SKLTSCP1507)。作者简介:陈虹,女,57岁,硕士,研究员。NumericalinvestigationonpressurizationdischargeofsubcooledliquidoxygenChenHong1GaoXu1WangXiangnan2ZhangZhongen2XiaMingbo3XieJunlong3ChenJianye3(1StateKeyLaboratoryofTechnologiesinSpaceCryogenicPropellants,Beijing100028,China)(2XichangSatelliteLaunchCenter,Xichang615606,China)(3SchoolofEnergyandPowerEngineering,HuazhongUniversityofScienceandTechnology,Wuhan430074,China)Abstract:AnumericalmodelbasedontheVolumeofFluidsandevaporation-condensationalgorithmwasbuilttoinvestigatethethermodynamicbehaviorofpressurizationdischargewithsub-cooledliquidoxygeninalargehorizontaltank.Thenumericalmodelwasverifiedbytheexperi-mentaldatafromtheliterature.Accordingly,theeffectsofvaryinginletgasmassflowrateontheperformanceofpressurizationdischargewerestudied.Thenumericalresultsshowsthatevapora-tionandcondensationsignificantlyaffectthepressuredropoftheullage.Varyinginletgasmassflowratecouldhelpweakenthefluctuationoftheullagepressureby3%.Besides,itrevealsthatthesubcooledliquidoxygenexperiencesanobvioustemperaturerise.Vortexoccursintheullageregion,leadingtothet...
