螺旋折流板管壳式换热器壳程局部传热及流阻.pdf

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第 36卷第 2期化学工程 Vol. 36 No. 2

2008年 2月 CHEM ICAL ENGINEER ING(CH INA) Feb. 2008
螺旋折流板管壳式换热器壳程局部传热及流阻
黄阔 1, 2 , 邓先和 1 , 陈庆辉 1
(1. 华南理工大学传热强化与过程节能教育部重点实验室, 广东广州 510640;
2. 广州市能源检测研究院, 广东广州 510170)
摘要:文中对螺旋折流板管壳式换热器壳侧局部传热、局部流速及阻力性能进行了实验研究,测量结果表明,其壳
侧局部传热膜系数与点速度是沿换热器的径向距离增大而增大,且局部传热膜系数的变化规律与相应点速度变化
规律相一致。所取 6个测量位置点分布较为均匀,基本上反映了换热器局部相应换2 热及流场分布规律。同时文中
归纳出换热器壳侧的平均努塞尔准数 N u与雷诺准数 Re的关联式及流动阻力系数 f与雷诺准数 Re的关联式,为换
热器的实际运用提供了参考依据。
关键词:螺旋折流板;壳侧传热膜系数;速度场;阻力系数
中图分类号: TK 124 文献标识码: A 文章编号: 1005 9954 (2008) 02 0013 04
Local heat transfer and flow resistance in shell side of
shell tube heat exchanger with helical baffles
HUANG Kuo, D ENG X ian he, CHEN Q ing hu i
(1. Key Laboratory of Enhanced Heat Transfer and Energy Conservation of the M inistry of Education,
South China University of Technology, Guangzhou 510640, Guangdong Province, China;
2. Guangzhou Energy Testing Academe, Guangzhou 510170, Guangdong Province, China)
Abstract: The local heat transfer performance, the distribution of velocity and the flow resistance of shell tube heat
exchanger with helical baffles were studied experimentally. The measurement results indicate that the local heat
transfer coefficient of tube bundle and the velocity of gas flow in shell side increase with the increasing of radial
distance of heat exchanger, and their change rules ar