Condensation on Horizontal Wired Elliptical Tubes

Tao Jinrui and Cheng ShangmoHuazhong University of Science and Technology; Wuhan

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Condensation on Horizontal Wired Elliptical Tubes

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- Condensation on Horizontal Wired Elliptical Tubes
- CIESC Journal Issue 1, (1991)
- 作者机构：
  
  华中理工大学,华中理工大学武汉,深圳赛格微电脑有限公司,武汉
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：25 February 1991，
  
  Published：25 February 1991
- 稿件说明：
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Tao Jinrui and Cheng ShangmoHuazhong University of Science and Technology, Wuhan. Condensation on Horizontal Wired Elliptical Tubes[J]. CIESC Journal, 1991, (1).
DOI：

Tao Jinrui and Cheng ShangmoHuazhong University of Science and Technology, Wuhan. Condensation on Horizontal Wired Elliptical Tubes[J]. CIESC Journal, 1991, (1). DOI：

摘要

本文得到了椭圆绕线管外局部及平均凝结换热Nusselt数的变化规律

分析了椭圆的几何参数、绕线参数及表面张力等因素对换热的影响

并将结果与圆管情况进行了比较.在A=1～8范围内

当e=0～0.9209时

绕线管与光管比较

冷凝效果高29%～109%左右.理论分析与实验结果相结合

得到了凝结换热无因次关系式和式中的经验常数

确定了最佳绕线参数.

Abstract

Condensation heat transfer from the external surface of horizontally pla red wired elliptical tubes was studied both theoretically and experimentally. The numerical solutions for local and average condensation Nusselt numbers Nu () and Nu were presented for a number of the values of parameters

e. A and were compared with classical solutions in a special case (circular smooth tube: e=0

A=0). The general non-dimensional formulae for condensation heat transfer were obtained and the empirical constants and optimum wiring parameters were proposed.

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