带内流道的板翅式换热器散热特性
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摘要
针对目前对带内流道的板翅式换热器研究较少及其散热量计算误差较大等问题,基于空气、热流体及散热器三者耦合的基础,构建了带内流道的板翅式换热器散热特性的仿真分析模型以及小型风洞实验系统;结果表明,构建的仿真分析模型在空气速度为1 m/s、入口温度为25℃的冷却条件下,其散热量随热流体流量的增大而增加,直至流量为3 L/min后趋于稳定,该模型的数值分析结果与实验结果最大偏差在5%以内.实验验证之后,探索了换热器的散热性能与流道分级数的作用关系;结果显示,采用4级结构内流道的散热器散热性能最好,温度均匀性最佳,但其内流道的最高温度仍低于热流体的入口温度22 K,这表明了在仿真分析中同时考虑空气、热流体及散热器三者耦合作用的必要性.
Currently,little study has been carried out on the plate-fin heat exchanger with internal flow channel,and its heat dissipation power cannot be calculated accurately as its boundary conditions are be over-simplified. Therefore,a simulation analysis model of plate-fin heat exchanger with internal flow channel and a small wind tunnel experimental system was developed based on the interactions of cooling air,hot fluid and heat exchanger. The results show that,under the cooling conditions of 1 m/s air speed and 25 ℃air inlet temperature,the heat dissipation power increases with mass volume of hot fluid,and will be stable after the mass volume reaches 3 L/min.The maximum deviation between the numerical analysis results and the experimental results is less than 5%. After validation,the effect of flow channel level on heat dissipation performance was investigated. The result shows that the heat exchanger with four-level internal flow channel is of best efficiency and temperature uniformity,but its highest temperature in internal flow channel is still lower than that of hot fluid inlet temperature 22 K,which demonstrates the necessity to take the interactions of cooling air,hot fluid and heat exchanger into consideration in simulation analysis.
Currently,little study has been carried out on the plate-fin heat exchanger with internal flow channel,and its heat dissipation power cannot be calculated accurately as its boundary conditions are be over-simplified. Therefore,a simulation analysis model of plate-fin heat exchanger with internal flow channel and a small wind tunnel experimental system was developed based on the interactions of cooling air,hot fluid and heat exchanger. The results show that,under the cooling conditions of 1 m/s air speed and 25 ℃air inlet temperature,the heat dissipation power increases with mass volume of hot fluid,and will be stable after the mass volume reaches 3 L/min.The maximum deviation between the numerical analysis results and the experimental results is less than 5%. After validation,the effect of flow channel level on heat dissipation performance was investigated. The result shows that the heat exchanger with four-level internal flow channel is of best efficiency and temperature uniformity,but its highest temperature in internal flow channel is still lower than that of hot fluid inlet temperature 22 K,which demonstrates the necessity to take the interactions of cooling air,hot fluid and heat exchanger into consideration in simulation analysis.
引文
[1] 郭浩,杨洪海,吴亚红,等.板翅式换热器传热性能与流动阻力的研究进展 [J].制冷与空调,2016,16(5):11- 15.GUO Hao,YANG Hong-hai,WU Ya-hong,et al.Research progress of heat transfer performance and flow resistance of plate-fin heat exchanger [J].Refrigeration and Air Conditioning,2016,16(5):11- 15.
[2] 刘景成,张树有,周智勇.板翅换热器流道结构改进与流体流动性能分析 [J].机械工程学报,2014,50(18):167- 176.LIU Jing-cheng,ZHANG Shu-you,ZHOU Zhi-yong.Analysis of channel structure improvement and its influence on fluid flow in plate-fin heat exchanger [J].Journal of Mechanical Engineering,2014,50(18):167- 176.
[3] 朱春玲,宁献文.用于机载大功率电子设备的新型液冷环控系统的研究 [J].南京航空航天大学学报,2005,37(2):203- 207.ZHU Chun-ling,NING Xian-wen.Liquid cooling system for high-powered avionics [J].Journal of Nanjing University of Aeronautics & Astronautics,2005,37(2):203- 207.
[4] 陈旭,李元山,毕人良.巨型计算机热设计技术现状及趋势 [J].电子工艺技术,2002,23(6):13- 17.CHEN Xu,LI Yuan-shan,BI Ren-liang.The status and development trends of thermal design technology for supercomputer [J].Electronics Process Technology,2002,23(6):13- 17.
[5] 蔡惠坤,张银亮,廖亦戴,等.多海拔下不同散热器翅片的性能分析 [J].华南理工大学学报(自然科学版),2017,45(2):91- 98.CAI Hui-kun,ZHANG Yin-liang,LIAO Yi-dai,et al.Performance analysis of different radiator fins at various altitudes [J].Journal of South China University of Technology(Natural Science Edition),2017,45(2):91- 98.
[6] 李广甫,郭宪民,张中芳.低温空气制冷系统中板翅换热器性能实验研究 [J].低温与超导,2013,41(6):71- 73.LI Guang-fu,GUO Xian-min,ZHANG Zhong-fang.Experimental study on the performance of plate-fin heat exchanger in the air cycle refrigeration system [J].Cryogenics and Superconductivity,2013,41(6):71- 73.
[7] LI J,PETERSON G P,CHENG P.Three-dimensional analy-sis of heat transfer in a micro-heat sink with single phase flow [J].International Journal of Heat & Mass Transfer,2004,47(19/20):4215- 4231.
[8] WU H H,HSIAO Y Y,HUANG H S,et al.A practical plate-fin heat sink model [J].Applied Thermal Engineering,2011,31(5):984- 992.
[9] YUAN W,ZHAO J,TSO C P,et al.Numerical simulation of the thermal hydraulic performance of a plate pin fin heat sink [J].Applied Thermal Engineering,2012,48(48):81- 88.
[10] CHEN C T,CHEN H I.Multi-objective optimization design of plate-fin heat sinks using a direction-based gene-tic algorithm [J].Journal of the Taiwan Institute of Chemical Engineers,2013,44(2):257- 265.
[11] 李学康.串联通道水冷散热器的建模与优化 [D].成都:电子科技大学,2013.
[12] LI H Y,CHAO S M.Measurement of performance of plate-fin heat sinks with cross flow cooling [J].International Journal of Heat & Mass Transfer,2009,52(13/14):2949- 2955.
[13] LI H Y,CHAO S M,CHEN J W,et al.Thermal perfor-mance of plate-fin heat sinks with piezoelectric cooling fan [J].International Journal of Heat & Mass Transfer,2013,57(2):722- 732.
[14] FENG S S,KUANG J J,WEN T,et al.An experimental and numerical study of finned metal foam heat sinks under impinging air jet cooling [J].International Journal of Heat & Mass Transfer,2014,77:1063- 1074.
[15] CHEN H T,TSENG H C,JHU S W.Numerical and experimental study of mixed convection heat transfer and fluid flow characteristics of plate-fin heat sinks [J].International Journal of Heat & Mass Transfer,2017,111:1050- 1062.
[16] XU G Q,WANG M,TAO Z,et al.Numerical analysis of flow and heat transfer characteristics of Y-fractal-link micro channel networks [C]// Proceedings of International Symposium on Advances in Computational Heat Transfer.Queensland:Novotel Palm Cove Resort,2008:8- 24.
[17] CAO H,CHEN G.Optimization design of microchannel heat sink geometry for high power laser mirror [J].Applied Thermal Engineering,2010,30(13):1644- 1651.
[18] LIU H L,AN X K,WANG C S.Heat transfer performance of T-Y type micro-channel heat sink with liquid GaInSn coolant [J].International Journal of Thermal Sciences,2017,120:203- 219.
[19] 廖亦戴.面式空气-滑油散热器设计及性能研究 [D].厦门:厦门大学,2018.
[20] 朱家玲,李晓光,张伟.车用散热器百叶窗布置方式的数值模拟与分析 [J].天津大学学报(自然科学与工程技术版),2013,46(3):244- 249.ZHU Jia-ling,LI Xiao-guang,ZHANG Wei.Numerical simulation and analysis of different Louver arrangements of automotive heat exchangers [J].Journal of Tianjin University(Science and Technology),2013,46(3):244- 249.
[2] 刘景成,张树有,周智勇.板翅换热器流道结构改进与流体流动性能分析 [J].机械工程学报,2014,50(18):167- 176.LIU Jing-cheng,ZHANG Shu-you,ZHOU Zhi-yong.Analysis of channel structure improvement and its influence on fluid flow in plate-fin heat exchanger [J].Journal of Mechanical Engineering,2014,50(18):167- 176.
[3] 朱春玲,宁献文.用于机载大功率电子设备的新型液冷环控系统的研究 [J].南京航空航天大学学报,2005,37(2):203- 207.ZHU Chun-ling,NING Xian-wen.Liquid cooling system for high-powered avionics [J].Journal of Nanjing University of Aeronautics & Astronautics,2005,37(2):203- 207.
[4] 陈旭,李元山,毕人良.巨型计算机热设计技术现状及趋势 [J].电子工艺技术,2002,23(6):13- 17.CHEN Xu,LI Yuan-shan,BI Ren-liang.The status and development trends of thermal design technology for supercomputer [J].Electronics Process Technology,2002,23(6):13- 17.
[5] 蔡惠坤,张银亮,廖亦戴,等.多海拔下不同散热器翅片的性能分析 [J].华南理工大学学报(自然科学版),2017,45(2):91- 98.CAI Hui-kun,ZHANG Yin-liang,LIAO Yi-dai,et al.Performance analysis of different radiator fins at various altitudes [J].Journal of South China University of Technology(Natural Science Edition),2017,45(2):91- 98.
[6] 李广甫,郭宪民,张中芳.低温空气制冷系统中板翅换热器性能实验研究 [J].低温与超导,2013,41(6):71- 73.LI Guang-fu,GUO Xian-min,ZHANG Zhong-fang.Experimental study on the performance of plate-fin heat exchanger in the air cycle refrigeration system [J].Cryogenics and Superconductivity,2013,41(6):71- 73.
[7] LI J,PETERSON G P,CHENG P.Three-dimensional analy-sis of heat transfer in a micro-heat sink with single phase flow [J].International Journal of Heat & Mass Transfer,2004,47(19/20):4215- 4231.
[8] WU H H,HSIAO Y Y,HUANG H S,et al.A practical plate-fin heat sink model [J].Applied Thermal Engineering,2011,31(5):984- 992.
[9] YUAN W,ZHAO J,TSO C P,et al.Numerical simulation of the thermal hydraulic performance of a plate pin fin heat sink [J].Applied Thermal Engineering,2012,48(48):81- 88.
[10] CHEN C T,CHEN H I.Multi-objective optimization design of plate-fin heat sinks using a direction-based gene-tic algorithm [J].Journal of the Taiwan Institute of Chemical Engineers,2013,44(2):257- 265.
[11] 李学康.串联通道水冷散热器的建模与优化 [D].成都:电子科技大学,2013.
[12] LI H Y,CHAO S M.Measurement of performance of plate-fin heat sinks with cross flow cooling [J].International Journal of Heat & Mass Transfer,2009,52(13/14):2949- 2955.
[13] LI H Y,CHAO S M,CHEN J W,et al.Thermal perfor-mance of plate-fin heat sinks with piezoelectric cooling fan [J].International Journal of Heat & Mass Transfer,2013,57(2):722- 732.
[14] FENG S S,KUANG J J,WEN T,et al.An experimental and numerical study of finned metal foam heat sinks under impinging air jet cooling [J].International Journal of Heat & Mass Transfer,2014,77:1063- 1074.
[15] CHEN H T,TSENG H C,JHU S W.Numerical and experimental study of mixed convection heat transfer and fluid flow characteristics of plate-fin heat sinks [J].International Journal of Heat & Mass Transfer,2017,111:1050- 1062.
[16] XU G Q,WANG M,TAO Z,et al.Numerical analysis of flow and heat transfer characteristics of Y-fractal-link micro channel networks [C]// Proceedings of International Symposium on Advances in Computational Heat Transfer.Queensland:Novotel Palm Cove Resort,2008:8- 24.
[17] CAO H,CHEN G.Optimization design of microchannel heat sink geometry for high power laser mirror [J].Applied Thermal Engineering,2010,30(13):1644- 1651.
[18] LIU H L,AN X K,WANG C S.Heat transfer performance of T-Y type micro-channel heat sink with liquid GaInSn coolant [J].International Journal of Thermal Sciences,2017,120:203- 219.
[19] 廖亦戴.面式空气-滑油散热器设计及性能研究 [D].厦门:厦门大学,2018.
[20] 朱家玲,李晓光,张伟.车用散热器百叶窗布置方式的数值模拟与分析 [J].天津大学学报(自然科学与工程技术版),2013,46(3):244- 249.ZHU Jia-ling,LI Xiao-guang,ZHANG Wei.Numerical simulation and analysis of different Louver arrangements of automotive heat exchangers [J].Journal of Tianjin University(Science and Technology),2013,46(3):244- 249.