低温缠绕管内流体螺旋绕流压降特性研究

doi:10.3901/JME.2025.05.297

摘要/Abstract

摘要： 多股流低温缠绕管换热器管内流体主要以螺旋交叉绕流为主，在天然气及氢气液化等低温工况下难以确定管侧压降数学计算模型，不能为低温动能损失设计提供理论依据；建立了低温缠绕管螺旋交叉结构系统物理模型、不同尺度螺旋缠绕管单元数学模型及压降单元数值模型；针对不同螺旋缠绕管物理模型，提出了单元螺旋压降计算模型及方法，并进行了单元模型压降数值模拟研究；构建了不同结构参数螺旋缠绕管实验模型并对单元理论模型及数值模型进行了实验验证。研究表明：单元螺旋压降法可用于解决复杂低温缠绕管换热器管侧压力损失的工程计算难题，为不同尺度不同结构的螺旋交叉缠绕管压降计算提供理论依据及工程设计方法。

关键词: 低温缠绕管换热器, 螺旋绕流压降计算, 单元螺旋压降法

Abstract: The fluid inside the multi-stream cryogenic wound-pipe heat exchanger (CWHE) is mainly helical cross flow, and it is difficult to determine the mathematical calculation model of the pressure drop on the pipe side under cryogenic conditions such as natural gas and hydrogen liquefaction, which cannot provide a theoretical basis for the design of cryogenic kinetic energy loss; a systematic physical model of the cross structure in cryogenic spiral wound pipe, a mathematical model of different scale spiral wound pipe units, and a numerical model of pressure drop units are established; a calculation model and method for unit spiral pressure drop are proposed for different spiral wound pipe models, and numerical simulation research on pressure drop of unit model is conducted; the experimental models of spiral wound pipes with different structural parameters are constructed and the unit theoretical model and numerical model are experimentally verified. The research shows that the method of unit spiral pressure drop can be used to solve the engineering calculation problem of pressure loss on the pipe side of complex cryogenic wound pipe heat exchangers, and provide a theoretical basis and engineering design method for pressure drop calculation of spiral cross wound pipes of different scales and structures.

Key words: cryogenic wound-pipe heat exchanger, calculation of spiral flow pressure drop, unit spiral pressure drop method

中图分类号:

TG156

张周卫, 代德山, 汪雅红, 牛旭转. 低温缠绕管内流体螺旋绕流压降特性研究[J]. 机械工程学报, 2025, 61(5): 297-307.

ZHANG Zhouwei, DAI Deshan, WANG Yahong, NIU Xuzhuan. Research on Pressure Drop Characteristics of Fluid Spiral Flow in Cryogenic Wound Pipe[J]. Journal of Mechanical Engineering, 2025, 61(5): 297-307.

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