翅片管气化器管内相变传热流动数值模拟.pdf

低温与超导制冷技术 Cryo. & Supercond.
第 40 卷第 2 期 Refrigeration Vol. 40 No. 2
翅片管气化器管内相变传热流动数值模拟
陈叔平,韩宏茵,谢福寿,姚淑婷,常智新
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兰州理工大学石油化工学院兰州 730050
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摘要采用 Fluent 多相流混合物模型通过用户自定义程序 UDF 实现了液氮相变模拟模拟了不同进口流速
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对翅片管气化器管内流体换热量、压力降、含气率及汽化体积的影响并分析了各参数随进口流速改变而变化的原
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因。由数值模拟可知翅片管内流体进出口焓差、含气率及单位质量汽化体积随进口流速的增加而减少而压力降
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和总换热量随进口流速的增加而增大其中压力降增大的主要原因是由加速压降引起。
关键词翅片管气化器相变液氮数值模拟
Numerical simulation of phase change heat transfer and flow for fin - tube vaporizer
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Chen Shuping Han Hongyin Xie Fushou Yao Shuting Chang Zhixin
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College of Petrochemical Engineering Lanzhou University of Technology Lanzhou 730050 China
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Abstract Using Fluent multiphase mixture model the phase change simulation of liquid nitrogen was achieved through Us-
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er - Defined Function UDF . The effect of different inlet velocities on fluid heat transfer rate pressure drop gas fraction and
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volume of gasification was simulated and the variation reasons of parameters with the inlet velocity were analyzed. According to
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the numerical simulation results the enthalpy difference gas fraction and volume of gasification per unit of mass will reduce with
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the increase of inlet velocity while the pressure drop and total heat transfer rate will add with the increase of inlet velocity. The
increase of pressure drop is mainly caused by the accelerated pressure drop.
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