LOCAL HEAT TRANSFER COEFFICIENT OF A HELICALLY SEGMENTED FINNED TUBE SURFACE

李瑞阳; 卓宁

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LOCAL HEAT TRANSFER COEFFICIENT OF A HELICALLY SEGMENTED FINNED TUBE SURFACE

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- LOCAL HEAT TRANSFER COEFFICIENT OF A HELICALLY SEGMENTED FINNED TUBE SURFACE
- CIESC Journal Issue 4, (1994)
- 作者机构：
  
  华东工业大学动力系!上海200093,华东工业大学动力系,上海,200093
- 作者简介：
- 基金信息：
- DOI：
  CLC： K124
- Online First：25 August 1994，
  
  Published：25 August 1994
- 稿件说明：
移动端阅览
李瑞阳, 卓宁. LOCAL HEAT TRANSFER COEFFICIENT OF A HELICALLY SEGMENTED FINNED TUBE SURFACE[J]. CIESC Journal, 1994, (4).
DOI：

李瑞阳, 卓宁. LOCAL HEAT TRANSFER COEFFICIENT OF A HELICALLY SEGMENTED FINNED TUBE SURFACE[J]. CIESC Journal, 1994, (4). DOI：

摘要

对齿型螺旋肋片管管束内部沿管表面周向的局部放热系数进行了研究.采用试验与数值计算相结合的方法

求得不同角度的局部放热系数

并通过数据拟合

给出Re=2×10~4～8×10~4范围内的肋管表面平均放热系数和按周向分布的局部放热系数的计算式.

Abstract

An investigation on the local heat transfer coefficient of a helically segmented finned tube surface in a tube bundle was conducted by experiment in cooperation with numerical calculation. In the experiment

the thermal couples were embedded only at an angle with the tube to be tested

then the temperature distribution around the tube was measured by revolving the tube under a certain experimental condition. On the basis of the experiment

the local heat transfer coefficients at different angles of the test tube surface for different experimental conditions were obtained by solving a set of two- dimensional finite difference equations. The results were fitted and the correlation equations for predicting the average and local heat transfer coefficients for helically finned tube in the tube bundle over the experimental range of Re = 20000-80000 were presented.

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