低温贮箱热力学排气系统两相换热器参数分析  

Analysis of parameters for two-phase heat exchanger in thermodynamic vent system

作　　者：朱仁烁 刘欣 杨勇[2] Zhu Renshuo;Liu Xin;Yang Yong(Beijing Institute of Astronautical Systems Engineering,Beijing 100076,China;China Academy of Launch Vehicle Technology,Beijing 100076,China)

机构地区：[1]北京宇航系统工程研究所,北京100076 [2]中国运载火箭技术研究院,北京100076

出　　处：《低温工程》2025年第2期96-102,共7页Cryogenics

基　　金：“十四五”民用航天项目(D030201)。

摘　　要：为提升热力学排气系统(TVS)的控压性能,建立了两相换热器的数值模型,分析了两相换热器管长和内外管直径对吸冷量、出口干度和出口温度的影响,提出了两相换热器进一步优化设计的目标和方向。研究表明:两相换热器的设计应该兼顾排气冷量的利用以及循环流体的降温降压效果,以内管循环流体吸冷量作为优化目标;换热过程中,内管对流传热系数远大于外管对流传热系数,强化外管对流换热对增强换热贡献更大;延长管长和改变内外管径均能改善外管冷却流体冷量的利用,且改变内管直径的综合效果最好。To improve the pressure control performance of the thermodynamic vent system(TVS),a numerical model for the two-phase heat exchanger was developed.The impacts of the exchanger length,as well as the inner and outer tube diameters on cooling absorption,outlet dry-ness and outlet temperature were analyzed.Objectives and directions for further optimization of the two-phase heat exchanger design were proposed.It is shown that the design should take into ac-count both the cooling of exhaust gas and the cooling and pressure reduction effects of the circulat-ing fluid,with the cooling absorption of the inner tube circulating fluid identified as the primary optimization target.The heat transfer coefficient of the inner tube is found to be significantly high-er than that of the outer tube,indicating that enhancing the heat transfer performance of outer tube result in greater contribution to overall heat transfer.It is also demonstrated that extending the tube length and modifying the diameters of the inner and outer tubes can improve the cooling per-formance of the outer fluid,with changes to the inner diameter having the most significant com-bined effect.

关 键 词：热力学排气系统 两相换热器 参数分析 

分 类 号：TB611[一般工业技术—制冷工程]