相变换热混合工质板翅式换热器流动与传热数值模拟.pdf

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低温与超导低温技术 Cryo. & Supercond.
第 36卷第 4期 Cryogenics Vol. 36 No. 4
相变换热混合工质板翅式
换热器流动与传热数值模拟
曲乐 1 ,贾林祥 2
(1. 中国空空导弹研究院,洛阳 471009; 2. 哈尔滨工业大学低温与超导技术研究所,哈尔滨 150001)
摘要:采用由 SRK方程计算得出的混合工质物性参数,将具有相变两相流体物性分三部分处理,得出混合工质
分段物性数据拟合曲线,并输入 FLUENT软件的材料物性数据文件中,作为数值模拟物性参数数据。在上述物性
数据处理的基础上,对混合工质天然气液化装置中换热器采用分段方式进行稳态数值模拟研究,得到沿长度方向
一定温度下传热系数、压力梯度的变化曲线。通过与 MUSE软件数据比较,计算结果有一定合理性,所得结论为有
相变换热的混合工质低温板翅式换热器的设计和优化提供一定参考。
关键词:低温传热;混合工质;相变换热;板翅式换热器;数值模拟
Num er ica l sim ula tion of flu id flow and hea t tran sfer of
refr igeran t m ixture for pla te - f in exchanger w ith pha se change
Qu Yue, J ia L inxiang
(1. China A irborne M issile Academy, Luoyang 471009, China;
2. Institute of Cryogenics and Superconductivity Technology, Harbin Institute of Technology, Harbin 150001, China)
Abstract: The thermal p roperties of refrigerant m ixture were calculated with SRK equation. The temperature range of two -
phase fluid with phase change was divided into 3 sections and the p iecewise curve of the m ixtures was formed. The data of physi
cal p roperties were typed to FLUENT database and used for numerical simulation. Based on data analysis above, the heat ex
changer in natural gas liquefaction system was simulated in the p iecewise mode and the curve of heat transfer coefficient and p res
sure gradient vs temperature was formed. Compared with MUSE software, the