真空条件下蒸汽横掠水平降膜管束的流动阻力

doi:10.3969/j.issn.0438-1157.2013.03.014

化工学报 ›› 2013, Vol. 64 ›› Issue (3): 886-890.DOI: 10.3969/j.issn.0438-1157.2013.03.014

真空条件下蒸汽横掠水平降膜管束的流动阻力

沈胜强, 刘华, 冯寅, 陈石, 龚路远, 刘瑞, 陈学

大连理工大学辽宁省海水淡化重点实验室,辽宁大连 116024

收稿日期:2012-06-05 修回日期:2012-11-16 出版日期:2013-03-05 发布日期:2013-03-05
通讯作者: 沈胜强(1961—),男,博士,教授。
作者简介:沈胜强(1961—),男,博士,教授。
基金资助:
高等学校博士学科点专项科研基金项目(20110041110032);辽宁省自然科学基金项目(20102031)。

Steam flow resistance across horizontal tube bundle under vacuum condition

SHEN Shengqiang, LIU Hua, FENG Yin, CHEN Shi, GONG Luyuan, LIU Rui, CHEN Xue

Key Laboratory for Sea Water Desalination of Liaoning Province, Dalian University of Technology, Dalian 116024, Liaoning, China

Received:2012-06-05 Revised:2012-11-16 Online:2013-03-05 Published:2013-03-05
Supported by:
supported by the Specialized Research Fund for the Doctoral Program of High Education(20110041110032)and the Natural Science Foundation of Liaoning Province(20102031).

摘要/Abstract

摘要： 建立了蒸汽横掠带有液体降膜流动的水平管束流动阻力实验台,对影响流动阻力的因素与规律进行了实验研究。实验在绝对压力为12～31 kPa的真空条件下进行,对应的水蒸气饱和温度为50～70℃,模拟了大型海水淡化装置中水平管降膜蒸发器的流动过程。实验结果显示,蒸汽掠过带有降膜流动的水平管束的压降远大于蒸汽横掠水平管束的流动阻力,流动阻力系数不仅与蒸汽流动Reynolds数有关,还与液体在水平管上降膜流动的Reynolds数有很大关联。提出了正三角形排列管束的蒸汽横掠降膜流动管束的阻力关系式。

关键词: 流动阻力, 降膜流动, 水平管管束

Abstract: An experiment investigation of steam flow resistance across horizontal falling film tube bundle was carried out.Experiments were performed to simulate the flow process in a large horizontal falling film evaporator of MED desalination plant under the pressure from 12 kPa to 31 kPa and at the corresponding saturated steam temperature from 50℃ to 70℃ respectively.The results indicated that pressure drop of steam flowing across tube bundle with falling film was far greater than that through a plain tube bundle.Pressure drop coefficient not only was affected by vapor Reynolds number but also changed significantly with spray Reynolds number.From the experimental results a flow resistance correlation for steam flowing across horizontal tube bundle with falling film was proposed.

Key words: flow resistance, falling film, horizontal tube bundle

中图分类号:

TK219
TK312

沈胜强, 刘华, 冯寅, 陈石, 龚路远, 刘瑞, 陈学. 真空条件下蒸汽横掠水平降膜管束的流动阻力[J]. 化工学报, 2013, 64(3): 886-890.

SHEN Shengqiang, LIU Hua, FENG Yin, CHEN Shi, GONG Luyuan, LIU Rui, CHEN Xue. Steam flow resistance across horizontal tube bundle under vacuum condition[J]. CIESC Journal, 2013, 64(3): 886-890.

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真空条件下蒸汽横掠水平降膜管束的流动阻力

Steam flow resistance across horizontal tube bundle under vacuum condition

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