周期性波纹通道内换热与流动的数值研究

计算物理 ›› 2006, Vol. 23 ›› Issue (1): 93-97.

周期性波纹通道内换热与流动的数值研究

谢公南, 王秋旺, 罗来勤

西安交通大学动力工程多相流国家重点实验室, 陕西西安 710049

收稿日期:2004-10-15 修回日期:2005-03-25 出版日期:2006-01-25 发布日期:2006-01-25
作者简介:谢公南(1980-),男,广东河源,博士生,主要从事流动与传热的数值模拟和换热器优化与预测,传热强化,数值模拟及新型高效换热设备方面的研究.
基金资助:
国家自然科学基金(50323001);教育部霍英东教育基金会高等院校青年教师基金(91056)资助项目

A Numerical Study of Heat Transfer and Fluid Flow in a Periodically Wavy Channel

XIE Gong-nan, WANG Qiu-wang, LUO Lai-qin

State Key Laboratory of Multiphase Flow in Power Engineering, Xi′an Jiaotong University, Xi′an 710049, China

Received:2004-10-15 Revised:2005-03-25 Online:2006-01-25 Published:2006-01-25

摘要/Abstract

摘要： 采用曲线坐标系下压力与速度耦合的SIMPLER算法,数值研究了一种紧凑换热器中波纹通道内周期性充分发展的层流流动与换热情况,流动Re数的范围为100~1100,Pr数为0.7.计算考察了不同波纹高度、波纹间距对流动与换热的影响,并对模型参数进行了性能评价.计算结果表明,整体Nu数及fRe数随着流动Re数的增加而增加.随着波纹高度的增加或波纹间距的减小,换热增强,特别是在高Re数下波纹高度的增加更加强化换热.最佳波纹高度和间距分别为1.15 mm和13 mm.

关键词: 对流换热, 周期性波纹通道, 几何参数

Abstract: The periodically fully developed laminar heat transfer and fluid flow in a two-dimensional wavy channel in a compact heat exchanger are investigated numerically. Calculations are performed at Pr=0.7, in the range of Re=100~1100 with non-orthogonal non-staggered grids. The Semi-Implicit Method for Pressure Linked Equations Revised (SIMPLER) algorithm in the curvilinear body-fitted coordinates is used. The effect of the wavy height and distance on momentum and heat transfer is studied. Performance of model parameters is evaluated. It is shown that the overall Nusseh numbers and friction factors increase with the increase of Reynolds numbers. The friction factors and overall Nusseh numbers increase as increasing the wavy height or decreasing the wavy distance. The overall Nusseh numbers increase significantly with the wavy height, especially at high Reynolds numbers. The best wavy height and distance are 1.15 mm and 13 mm, respectively.

Key words: convective heat transfer, periodically wavy channel, geometry parameter

中图分类号:

TK124

谢公南, 王秋旺, 罗来勤. 周期性波纹通道内换热与流动的数值研究[J]. 计算物理, 2006, 23(1): 93-97.

XIE Gong-nan, WANG Qiu-wang, LUO Lai-qin. A Numerical Study of Heat Transfer and Fluid Flow in a Periodically Wavy Channel[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2006, 23(1): 93-97.

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