原子能科学技术2012，Vol.46Issue(2)：192-198,7.
自然循环换热器壳侧传热及流动的数值模拟
Numerical Simulation of Shell-Side Heat Transfer and Flow of Natural Circulation Heat Exchanger
薛若军 1邓程程 1李朝君 1王明远1
作者信息
- 1. 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
- 折叠
摘要
Abstract
In order to analyze the influence on the heat transfer and flow characteristics of the heat exchanger model of different solving models and structures, a variety of transformation to the model equivalent for the heat exchanger was studied. In this paper, Fluent software was used to simulate the temperature-field and flow-field of the equivalent model, and investigate its heat-transferring and flow characteristics. Through comparative analysis of the distribution of temperature-field and flow-field for different models, the heat-transferring process and natural convection situation of heat exchanger were deeply understood. The results show that the temperature difference between the inside and outside of the natural circulation heat exchanger tubes is larger and the flow is more complex, so the turbulence model is the more reasonable choice. Asymmetry of tubes position makes the flow and heat transfer of the fluid on both sides to be dissymmetrical and makes the fluid interaction, and increases the role of natural convection. The complex structure of heat exchanger makes the flow and heat transferof the fluid on both sides to be irregular to some extent when straight tubes into C-bent are transformed, and all these make the turbulence intensity increase and improve the effect of heat transfer.关键词
换热器/非稳态数值模拟/自然对流Key words
heat exchanger/unsteady numerical simulation/natural convection分类
能源科技引用本文复制引用
薛若军,邓程程,李朝君,王明远..自然循环换热器壳侧传热及流动的数值模拟[J].原子能科学技术,2012,46(2):192-198,7.
