全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
化工学报  2014 

基于螺旋片强化的套管换热器性能研究

, PP. 0-0

Keywords: 数学模拟,传热,计算流体力学,螺旋片,套管式换热器,螺旋升角,综合传热性能

Full-Text   Cite this paper   Add to My Lib

Abstract:

基于RNGk-ε模型对螺旋片强化的套管换热器的传热进行模拟,通过模拟结果与文献中的实验结果进行对比来验证模拟的可行性;分析了雷诺数Re为2362~16860范围内的螺旋升角α变化对努塞尔数Nu和摩擦阻力系数f的影响;并考察了等泵功率下的综合传热性能PEC值的变化规律。结果表明:Nu和f的平均误差分别为7.1%和1.3%,证明所采用的研究方法是可行的;α在15°~75°范围内,Nu和f均随着α的减小而增大,特别的,当α小于35°时,f随α的减小剧烈增大;在等泵功率下,PEC值为0.84~1.93;α在15°~45°时,α为35°具有较好的综合传热性能,α为55°、65°和75°时,虽然其PEC值比35°时略高,但其Nu与35°时相比要小很多,实际应用中考虑到传热速率的问题,选择35°的螺旋升角较为合适,此时,PEC值为1.26~1.62。另外,为减小f,提出倾斜螺旋片强化的方法;螺旋升角α为35°、螺旋片倾斜角β为10°时,与普通螺旋片相比,Nu基本一致,甚至略大,而f减小了12.5%~14.5%,此时,PEC值为1.38~1.71;场协同理论也很好的验证了这一结果。

References

[1]  Ke Rubai(柯如柏).Experiment and analysis of gas heat transfer reinforcement method and theory of casing heat exchanger [J].Journal of Refrigeration(制冷学报),1989(4):4-8
[2]  ZHANG L,GUO H M,WU J H et al. Compound heat transfer enhancement for shell side of double-pipe heat exchanger by helical fins and vortex generators[J].Heat Mass Transfer(传热传质),2012,48(7):1113-1124
[3]  Zhang Li(张丽),Tian Mimi(田密密),Wu Jianhua(吴剑华) et al.Transfer performance of the shell side of double-Pipe heat exchanger enhanced with helical fins [J]. Journal of Chemical Engineering of Chinese Universities(高校化学工程学报),2011,25(1):24-29
[4]  Zhu Dengliang(朱登亮),Wu Jinxing(吴金星),Wei Xinli(魏新利),et al. Numerical analyses on enhanced heat transfer of the helical baffle strip in the shell side of the heat exchange. Chemical Industry and Engineering Progress(化工进展),2006,25(增刊):392-396
[5]  Yang Shiming(杨世铭).Heat Transfer (传热学)[M].Tao Wenquan(陶文铨).Beijing(北京):Higher Education Press,2006:229-300
[6]  Wu Jianhua(吴剑华),Zhang Li(张丽).Fluid flow and compound heat transfer enhancement for shell side of double-Pipe heat exchanger enhanced by helical fins [D].Tianjin:Tianjin University,2011
[7]  SHOU S, CHIHNG T L, ANTHONY C K.Heat transfer coefficients of double pipe heat exchanger with helical type roughened surface[J].Heat Recovery Systems and CHP,1987,7(2):119-127
[8]  ZHANG L,DU W J, WU J H,et al. Fluid flow characteristics for shell side of double-pipe heat exchanger with helical fins and pin fins[J].Experimental Thermal and Fluid Science,2012,36(1):30-43
[9]  Dong Qiwu(董其伍),Liu Minshan(刘敏珊),Zhao Xiaodong(赵晓冬).Numerical simulation and research of fluid flow and heat transfer in the shell side of rod baffle heat exchanger with longitudinal flow of shell side fluid [J].Journal of Chemical Industry and Engineering(化工学报),2006,57(5):1073-1078
[10]  Wang Dingbiao(王定标),Wang Hongbin(王宏斌),Liang Zhenxiang(梁珍祥).Numerical research on heat transfer and flow resistance performance of twisted trifoliate tube[J].Journal of Chemical Industry and Engineering(化工学报),2012,63(7):2064-2069
[11]  Wang Dingbiao (王定标),Xiang Sa (向飒), Dong Qiwu(董其伍),Liu Minshan (刘敏珊),Wei Xinli ( 魏新利).Flow field in heat exchanger wit h longitudinal flow of shell side fluid[J].Journal of Chemical Industry and Engineering(化工学报), 2004, 55 (5) : 6992703
[12]  Wang Dingbiao ( 王定标). Application of numerical simulation technology in heat exchanger with longitudinal flow of shell side fluid [D]. Shanghai: East China University of Science & Technology, 1999
[13]  Wu Jinxing(吴金星), Wang Dingbiao(王定标), Wei Xinli(魏新利). Progress in numerical simulation study of fluid flow and heat transfer in shell side of shell and tube heat exchangers [J]. Fluid Machinery(流体机械), 2002, 30(5): 28-32
[14]  Deng X H, Deng S J. Investigation of heat transfer enhancement of roughened tube bundles supported by ring or rod supports [J].Heat Transfer Engineering, 1998, 19(2): 21-27
[15]  Wang Yongqing (王永庆). Research and analysis of shell side characteristic wit h different support structures in heat exchangers with longitudinal flow of shell side fluid [D].Zhengzhou: Zhengzhou University, 2005
[16]  Wang Fujun(王福军).Computational Fluid Dynamics Analysis (计算流体力学)[M].Beijing:Tsinghua University Press,2004:113-143
[17]  Guo Zengyuan(过增元).Field Synergy Principle of Heat Transfer Enhancement with New Technology (场协同原理与强化传热新技术)[M].Huang Suyi(黄素逸).Beijing:China Electric Power Press,2004:2-4
[18]  He Yaling(何雅玲),Lei Yonggang(雷勇刚),Tian Liting(田丽亭),et al. High-efficiency and low-resistance strengthened heat transfer technology of three field synergy [J].Journal of Engineering Thermophysics(工程热物理学报),2009,30(11):1904-1906
[19]  Guo Zengyuan(过增元). Principle of field coordination in heat exchanger and its applications[J].Chinese Journal of Mechanical Engineering(机械工程学报),2003,39(12):1-9
[20]  Wu Jinxing(吴金星),Dong Qiwu(董其伍),Liu Minshan(刘敏珊),Wei Xinli(魏新利).Numerical simulation on the turbulent flow and heat transfer in the shell side of the rod baffle heat exchanger[J].Journal of Chemical Engineering of Chinese Universities(高校化学工程学报),2006,20(2):213-216
[21]  Huang Debin (黄德斌), Deng Xianhe (邓先和), Xing Huawei (邢华伟). Numerical study on hydrodynamics and heat transfer properties of hetero-shape tubes [J] .Journal of Chemical Engineering of Chinese Universities(高校化学工程学报),2003, 17(2): 146-150

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133