变截面导流筒换热器入口流场均化性能数值仿真

doi:10.3969/j.issn.0438-1157.2012.12.015

化工学报 ›› 2012, Vol. 63 ›› Issue (12): 3839-3846.DOI: 10.3969/j.issn.0438-1157.2012.12.015

变截面导流筒换热器入口流场均化性能数值仿真

古新, 朱培纳, 刘敏珊, 郝建设

郑州大学河南省过程传热与节能重点实验室, 河南郑州 450002

收稿日期:2012-04-22 修回日期:2012-08-31 出版日期:2012-12-05 发布日期:2012-09-03
通讯作者: 朱培纳
作者简介:古新(1978-),男,副教授。
基金资助:
国家自然科学基金项目(51006092)。

Numerical simulation on flow field in entrance region of heat exchanger with tapered flow distributor

GU Xin, ZHU Peina, LIU Minshan, HAO Jianshe

Key Laboratory of Process Heat Transfer and Energy Saving of Henan Province, Zhengzhou University, Zhengzhou 450002, Henan, China

Received:2012-04-22 Revised:2012-08-31 Online:2012-12-05 Published:2012-09-03
Supported by:
supported by the National Natural Science Foundation of China(51006092).

摘要/Abstract

摘要： 采用变截面导流筒真实三维实体模型,通过数值模拟的方法,以流体流动均匀性和压降作为综合衡量依据,研究了变截面导流筒装置中关键结构参数的变化对其内部流体流动均匀性和流体流动阻力的影响规律,得出了导流筒的结构参数L,H,θ与壳程进口处流体流动状况的对应关系,证实了在适当范围内调整上述结构参数,不仅可以提高壳程进口处流体流动均匀性,而且可以有效降低壳程流体的压力损失。从导流筒换热器的流体流动均匀性和壳程压降角度出发,推荐L,θ,H的取值范围分别是:L=50~70 mm,θ=7°~12.5°,H=50~100 mm。研究结果为变截面导流筒换热器优化设计提供了参考依据。

关键词: 换热器, 变截面导流筒, 实体模型, 流场, 数值仿真

Abstract: Taking the fluid flow uniformity and pressure drop as the evaluation indexes,the real 3D solid numerical model is adopted to investigate the influence of geometrical structure parameters of the tapered flow distributor on flow uniformity and flow resistance.The corresponding relation charts of flow status in entrance region of shell side and key structure parameters L,θ,and H are obtained,where L is the distance between the inner surface of jacket and the exine of internal liner barrel,θ is the inclination angle of inlet section where fluid enter the draft-tube,and H is the distance from the high end of the internal liner barrel to the tube plate. By adjusting the above structure parameters in proper ranges,the flow uniformity at the entrance section of the shell side can be improved and the pressure drop in the shell side is decreased effectively.The ranges of L,θ,and H values recommended are:L=50-70 mm,θ=7°-12.5°,H=50-100 mm for the optimum design.

Key words: heat exchanger, tapered flow distributor, solid model, flow field, numerical simulation

中图分类号:

TK124

古新, 朱培纳, 刘敏珊, 郝建设. 变截面导流筒换热器入口流场均化性能数值仿真[J]. 化工学报, 2012, 63(12): 3839-3846.

GU Xin, ZHU Peina, LIU Minshan, HAO Jianshe. Numerical simulation on flow field in entrance region of heat exchanger with tapered flow distributor[J]. CIESC Journal, 2012, 63(12): 3839-3846.

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变截面导流筒换热器入口流场均化性能数值仿真

Numerical simulation on flow field in entrance region of heat exchanger with tapered flow distributor

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