水平管内纯饱和蒸汽强制对流冷凝局部换热特性

doi:10.11949/j.issn.0438-1157.20140754

化工学报 ›› 2015, Vol. 66 ›› Issue (1): 92-98.DOI: 10.11949/j.issn.0438-1157.20140754

水平管内纯饱和蒸汽强制对流冷凝局部换热特性

徐慧强, 孙中宁, 谷海峰, 李昊

哈尔滨工程大学核安全与仿真技术国防重点学科实验室, 黑龙江哈尔滨 150001

收稿日期:2014-05-10 修回日期:2014-09-29 出版日期:2015-01-05 发布日期:2015-01-05
通讯作者: 孙中宁

Local heat transfer characteristics of saturated steam forced convection condensation inside horizontal tube

XU Huiqiang, SUN Zhongning, GU Haifeng, LI Hao

Nuclear Safety and Simulation Technology Key Laboratory of National Defense Disciplines, Harbin Engineering University, Harbin 150001, Heilongjiang, China

Received:2014-05-10 Revised:2014-09-29 Online:2015-01-05 Published:2015-01-05

摘要/Abstract

摘要：

通过对水平管内饱和纯蒸汽强制对流冷凝换热的实验研究, 分析在管内两相流型为环状流-半环状与波状流时, 质量含汽率、蒸汽入口流速和压力对蒸汽冷凝换热的影响, 并得到了同时适用于这两种流型的计算局部冷凝传热系数的经验关联式。结果表明:局部冷凝传热系数在环状流-半环状流及波状流下均随质量含汽率和压力的降低而减小;在环状流-半环状流下, 随蒸汽入口流速的升高而增大, 在波状流下, 随蒸汽入口流速的增大而减小;实验拟合所得到的换热经验关联式与实验结果符合良好, 偏差在±20%以内。

关键词: 水平管, 环状流-半环状流, 波状流, 纯蒸汽, 局部冷凝换热

Abstract:

An experimental investigation on forced convection condensation of saturated steam inside a horizontal tube was performed. The influences of steam quality, inlet steam velocity, and inlet steam pressure on condensation heat transfer were analyzed for annular-semiannular and wavy flows. A correlation for the local heat transfer coefficient of saturated steam condensation along a horizontal tube for both annular-semiannular and wavy flows was developed. For both annular-semiannular and wavy flows, local heat transfer coefficient decreased with steam quality and steam pressure. However, local heat transfer coefficient increased with inlet steam velocity for annular-semiannular flow while decreased with inlet steam velocity for wavy flow. The new correlation showed good agreement with experimental results with an error of 20% between calculated and experimental results.

Key words: horizontal tube, annular-semiannular flow, wavy flow, steam, local condensation heat transfer

中图分类号:

TL332

徐慧强, 孙中宁, 谷海峰, 李昊. 水平管内纯饱和蒸汽强制对流冷凝局部换热特性[J]. 化工学报, 2015, 66(1): 92-98.

XU Huiqiang, SUN Zhongning, GU Haifeng, LI Hao. Local heat transfer characteristics of saturated steam forced convection condensation inside horizontal tube[J]. CIESC Journal, 2015, 66(1): 92-98.

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水平管内纯饱和蒸汽强制对流冷凝局部换热特性

Local heat transfer characteristics of saturated steam forced convection condensation inside horizontal tube

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