Study on laminar film-wise condensation for vapor flow in an inclined small/mini-diameter tube

被引：74

作者：

Wang, BX ^{[1
]}

Du, XZ ^{[1
]}

机构：

[1] Tsing Hua Univ, Dept Thermal Engn, Beijing 100084, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2000年 / 43卷 / 10期

基金：

中国国家自然科学基金;

关键词：

laminar flow; filmwise condensation; small/mini-diameter tubes; experimental examination;

D O I：

10.1016/S0017-9310(99)00256-2

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The correlating factors for flow condensation in small/mini-diameter tubes are analyzed by energy consideration. Based on the in-situ interface configuration, an analytical model is proposed for predicting the heat transfer characteristics. Both analytical and experimental results show that gravity has a decreasing effect on flow condensation in small/mini tubes. The inclination angle affects condensation heat transfer mainly by distributing gravity in stratifying the fluids and thinning the liquid film. In larger tubes, the former may become the main reason for heat transfer enhancement, especially in high vapor quality zone and at low inlet vapor Reynolds number. Comparison with the experimental data indicates that the proposed analytical model has a good capability for predicting flow condensation heat transfer in small/mini-diameter tubes. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：1859 / 1868

页数：10

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