[1]吴嘉峰,陈永平,施明恒,等.三角形微通道中环状冷凝过程的数值模拟[J].东南大学学报(自然科学版),2007,37(3):423-426.[doi:10.3969/j.issn.1001-0505.2007.03.014]
 Wu Jiafeng,Chen Yongping,Shi Mingheng,et al.Numerical simulation for annular condensation flow in triangular microchannels[J].Journal of Southeast University (Natural Science Edition),2007,37(3):423-426.[doi:10.3969/j.issn.1001-0505.2007.03.014]
点击复制

三角形微通道中环状冷凝过程的数值模拟()
分享到:

《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
37
期数:
2007年第3期
页码:
423-426
栏目:
能源与动力工程
出版日期:
2007-05-20

文章信息/Info

Title:
Numerical simulation for annular condensation flow in triangular microchannels
作者:
吴嘉峰 陈永平 施明恒 张程宾 肖春梅
东南大学能源与环境学院, 南京 210096
Author(s):
Wu Jiafeng Chen Yongping Shi Mingheng Zhang Chengbin Xiao Chunmei
School of Energy and Environment, Southeast University, Nanjing 210096, China
关键词:
微通道 冷凝 数值模拟
Keywords:
microchannel condensation numerical simulation
分类号:
TK124
DOI:
10.3969/j.issn.1001-0505.2007.03.014
摘要:
建立了三角形微通道中环状冷凝的一维稳态模型,给出了等边三角形微通道中环状冷凝过程的液相毛细半径沿轴向的变化曲线.计算发现,在等边三角形微通道中,气液界面毛细半径先沿程急剧增加,然后趋向平缓,最后再急剧上升,且毛细半径的平缓段占据了绝大部分冷凝段总长度.在接触角和通道热流密度较小或者通道水力直径和入口蒸气压力较大时,冷凝段长度较长.在冷凝过程中,流速和液相压力沿程变化剧烈.该模型较好地解释了三角形微通道环状冷凝机理,并能用于估算冷凝过程的部分参数,为进一步推导更完善的微通道冷凝模型奠定了基础.
Abstract:
A one dimensional steady condensation model for annular flow in triangular microchannels was developed. The curvature radius distribution of the condensate stream along the channel was calculated. It is found that the curvature radius of the liquid phase increases rapidly at the beginning. When the condensation process developes along the microchannels, the radius increase turns to be more slowly. At the end of condensation range the radius increases rapidly again. The smooth radius distribution takes place in the most part of the total condensation length. The total condensation length is determined by the contact angle, the hydraulic diameter of the channel, the steam pressure and the heat flux. A smaller contact angle and heat flux or a larger hydraulic diameter and steam pressure cause a longer condensation length. The change of the pressure in the liquid phase and the velocities along the channel is remarkable. This one dimensional steady model provides a better understanding of the mechanisms of condensation in triangular microchannels.

参考文献/References:

[1] Suo M,Griffith P.Two-phase flow in capillary tubes [J]. Journal of Basic Engineering,1964,86(3):576-582.
[2] Dukler A E,Fabre J A,Mcquillen J B,et al,Gas-liquid flow at microgravity conditions-flow patterns and their transitions [J]. International Journal of Multiphase Flow,1988,14(4):389-400.
[3] John W C,Garimella S.Characterization of two-phase flow patterns in small diameter round and rectangular tubes [J].International Journal of Heat and Mass Transfer,1999,42(15):2869-2881.
[4] Garimella S.Condensation flow mechanisms in microchannels:basis for pressure drop and heat transfer models [J]. Heat Transfer Engineering, 2004,25(3):104-116.
[5] Chen Y P,Cheng P.Condensation of steam in silicon microchannels [J]. International Communications in Heat and Mass Transfer,2005,32(1/2):175-183.
[6] Chen Y P,Li J,Peterson G P.Influence of hydraulic diameter on flow condensation in silicon microchannels [C] //13th International Heat Transfer Conference.Sydney,Australia,2006.
[7] Wu H Y,Cheng P.Condensation flow patterns in silicon microchannels [J]. International Journal of Heat and Mass Transfer,2005,48(11):2186-2197.
[8] Zhao T S,Liao Q.Theoretical analysis of film condensation heat transfer inside vertical mini triangular channels [J]. International Journal of Heat and Mass Transfer,2002,45(13):2829-2842.
[9] Peterson G P,Ma H B.Temperature response of heat transport in a micro heat pipe [J]. Journal of Heat Transfer,1999,121(2):438-445.
[10] Peles Y P,Haber S.A steady state,one dimensional,model for boiling two phase — flow in triangular micro-channel [J]. International Journal of Multiphase Flow,2000,26(7):1095-1115.

相似文献/References:

[1]鲁进利,周宾,许忠林,等.不同截面微通道中流动阻力特性[J].东南大学学报(自然科学版),2011,41(3):554.[doi:10.3969/j.issn.1001-0505.2011.03.024]
 Lu Jinli,Zhou Bin,Xu Zhonglin,et al.Flow characteristics in microchannel with different cross-section[J].Journal of Southeast University (Natural Science Edition),2011,41(3):554.[doi:10.3969/j.issn.1001-0505.2011.03.024]
[2]程胜明,殷勇高.一种基于溶液除湿的消除湿烟羽新系统[J].东南大学学报(自然科学版),2020,50(2):334.[doi:10.3969/j.issn.1001-0505.2020.02.018]
 Cheng Shengming,Yin Yonggao.New system for eliminating wet plume based on liquid desiccant dehumidification[J].Journal of Southeast University (Natural Science Edition),2020,50(3):334.[doi:10.3969/j.issn.1001-0505.2020.02.018]

备注/Memo

备注/Memo:
基金项目: 霍英东青年教师基金资助项目(101055)、教育部科学技术研究重点资助项目(105082)、教育部留学回国人员科研启动基金资助项目(6803001006)、东南大学优秀青年教师教学科研资助计划资助项目、江苏省“青蓝工程”中青年学术带头人资助计划资助项目.
作者简介: 吴嘉峰(1980—),男,博士生; 陈永平(联系人),男,研究员, ypchen@seu.edu.cn.
更新日期/Last Update: 2007-05-20