重力对R134a在矩形小通道内冷凝过程的影响

李盼盼; 陈振乾

doi:10.11728/cjss2016.04.525

重力对R134a在矩形小通道内冷凝过程的影响

doi: 10.11728/cjss2016.04.525

李盼盼,
陈振乾^,

东南大学能源与环境学院南京 210096

基金项目: 载人航天工程项目（TZYY08001）和中国科学院战略性先导科技专项项目（XDA04077800）共同资助

详细信息

作者简介:

李盼盼,739638617@qq.com.

通讯作者:

陈振乾,E-mail:zqchen@seu.edu.cn

中图分类号: V524
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- 被引次数: 0
出版历程
- 收稿日期: 2015-11-10
- 修回日期: 2016-05-26
- 刊出日期: 2016-07-15

Effect of Gravity during Condensation of R134a in a Rectangular Minichannel

LI Panpan,
CHEN Zhenqian^,

School of Energy and Environment, Southeast University, Nanjing 210096

摘要

摘要: 为研究重力对小通道冷凝过程的影响，采用VOF模型对制冷剂R134a在水平放置的边长1mm方形截面小通道内的冷凝换热过程进行数值模拟.模拟过程考虑重力、表面张力和界面剪切力的综合作用，表面张力采用CSF模型.结果表明：重力对矩形小通道冷凝换热的影响不明显，蒸气在通道横截面上呈近似圆形分布；通道较短时重力对液膜的汇聚作用不明显，达到一定长度后重力作用凸显.研究结果为天舟一号货运飞船搭载的蒸发与冷凝科学实验研究项目冷凝空间实验方案设计提供了理论依据.
- 小通道 /
- 冷凝 /
- 重力效应 /
- 数值模拟 /
- VOF模型
Abstract: In order to study the effect of gravity on the condensation of R134a in a horizontal single square minichannel with 1mm side length, a Volume of Fluid (VOF) method is adopted to simulate the condensation process. The influence of gravity, surface tension and gas-liquid interfacial shear stress are taken into account. The Continuum Surface Force model is chosen for surface tension. Results denote that the lowest velocity and temperature appears at the corner of channel, where condensation occurs first. The distribution shape of the steam in the cross section of the channel is approximately circular and the condensation increases along the flow direction. In square minichannel, the effect of gravity on condensation can be neglected and the condensation is dominated by surface tension and gas-liquid interfacial shear stress at low and high inlet mass velocity respectively. The influence of gravity in condensation film is unobvious when the minichannel is short. In long minichannel, the condensation accumulates in the bottom of channel because of gravity which is not benefit for condensation heat transfer.
- Minichannel /
- Condensation /
- Gravity effect /
- Numerical simulation /
- Volume of Fluid (VOF) method

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参考文献(13)

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