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浙江大学学报(工学版)
能源工程     
螺旋翅片-槽管式EGR冷却器流体换热性能分析
浙江大学 能源工程学系,浙江 杭州 310027
Complex turbulent flow and heat transfer characteristics of spiral finned groove tubes in EGR cooler
YUAN Bo, HAO Zhi yong, LI Heng, ZHENG Xu
College of Energy Engineering, Zhejiang University,Hangzhou 310027,China
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摘要:

针对螺旋槽管式废气再循环系统(EGR)冷却器强化换热引起流动阻力增大的问题,通过计算流体力学(CFD)仿真计算及试验探究螺旋槽管式EGR冷却器流体换热性能后,提出螺旋翅片与螺旋槽管配合的新型EGR冷却器.通过CFD法将优化结构与光管、螺旋槽管、螺旋翅片-光管式冷却器进行对比,对螺旋翅片的高、长及螺距于流动换热的影响进行仿真预测.结果表明:螺旋槽管式EGR仿真与试验结果对比显示换热系数最大偏差3.9 %,压降值最大偏差6.8 %,在工程应用接受范围内,保证了分析方法的可靠性.螺旋翅片-槽管式EGR冷却器相比螺旋槽管式能增强换热并减小流阻,翅片形成螺旋流与螺旋槽形成螺旋流相似,能减小流阻近20%,翅片产生的螺旋流使螺旋槽处扰流效果增强,较螺旋槽管式冷却器出口温度最大下降4.5%|螺旋翅片总长增大半个螺距长度,出口温度最大降幅达6.2%,螺距长度按160 mm均分,每减少一个螺距,对应流阻降幅达10%,翅片高度对性能影响不大,适当减小尺寸可减少加工材料,节约成本.

Abstract:

Aiming at the problem of the increasing flow resistance caused by the heat transfer of the spiral groove tube EGR cooler, the heat transfer performance of spiral groove tube in EGR cooler was analyzed through numerical simulation method, which was compared with bench test. The optimization structure of spiral finned groove tube was proposed. A comparative analysis was conducted among the light tube, the spiral groove tube, the spiral finned light tube and the spiral finned groove tube. The influence of height, length and pitch of the spiral fins on the flow and heat transfer characteristics was analyzed. Results showed that the maximum deviation of heat transfer coefficient caculated from the numerical simulation and experiment method for the spiral groove tube EGR cooler was 3.9% and that for pressure drop was 6.8%, which was acceptable in engineering application and ensured the reliability of analysis method. The spiral finned tube EGR cooler can enhance heat transfer performance and reduce flow resistance. The spiral flow created by fin is similar to that created by spiral groove tube, which can reduce the flow resistance by 20%, and the spiral fin can enhance the disturbance flow that created by the spiral groove tube. As a result, the outlet temperature drops by 4.5%. The maximum outlet temperature drops by 6.2%, as the total length of the spiral fin increases by half a pitch . The flow resistance increases by 10%, while one more pitch is added in fixed length of 160 mm. Results show that height affects little. Appropriate reduction of the size of height can reduce processing materials and save cost.

出版日期: 2016-08-01
:  TK421+.5  
通讯作者: 郝志勇,男,教授. ORCID: 0000-0002-9907-8734.     E-mail: haozy@zju.edu.cn
作者简介: 袁博(1989—),男,硕士生,从事发动机CAE仿真及流动换热性能等研究. ORCID: 0000-0001-9601-4973. E-mail: 21327079@zju.edu.cn
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引用本文:

袁博, 郝志勇, 李恒, 郑旭. 螺旋翅片-槽管式EGR冷却器流体换热性能分析[J]. 浙江大学学报(工学版), 10.3785/j.issn.1008-973X.2016.08.012.

YUAN Bo, HAO Zhi yong, LI Heng, ZHENG Xu. Complex turbulent flow and heat transfer characteristics of spiral finned groove tubes in EGR cooler. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 10.3785/j.issn.1008-973X.2016.08.012.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2016.08.012        http://www.zjujournals.com/eng/CN/Y2016/V50/I8/1507

[1] BAS H, OZCEYHAN V. Heat transfer enhancement in atube with twisted tape inserts placed separately from the tubewall [J]. Experimental Thermal and Fluid Science, 2012,41(1): 51-58.
[2] GUNES S, OZCEYHAN V, BUYUKALACA O. Heattransfer enhancement in a tube with equilateral triangle cross sectioned coiled wire inserts [J]. Experimental Thermal and Fluid Science, 2010, 34(6): 684-691.
[3] SAHA S K. Thermal and friction characteristics of laminar flow through rectangular and square ducts with transverse ribs and wire coil inserts [J]. Experimental Thermal and Fluid Science, 2010,34(1): 63-72.
[4] BHUIYA M M K, AHAMED J U, CHOWDHURY M S U, et al. Heat transfer enhancement and development of correlation for turbulent flow through a tube with triple helical tape inserts [J]. International Communications in Heat and Mass Transfer, 2012,39(1): 94-101.
[5] HEJAZI V, AKHAVANBEHABADI M A, AFSHARI A. Experimental investigation of twisted tape inserts performance on condensation heat transfer enhancement and pressure drop [J]. International Communications in Heat and Mass Transfer, 2010,37 (9): 1376-1387.
[6] 崔永章,田茂诚,李广鹏.内置折边扭带圆管内三维流动与传热数值模拟[J].山东大学学报:工学版,2010,40(2): 143-148.
CUI Yongzhang, TIAN Maocheng, LI Guangpeng. Numerical simulation of threedimensional flow and heat transfer in a circular tube with twisted folding tape [J]. Journal of Shandong University :Engineering Science, 2010,40(2): 143-148.
[7] 唐志伟,于文俊,李翔.管内插入扭带的强化传热数值模拟[J].北京工业大学学报,2009,35(5):  652-658.
TANG Zhiwei, YU Wenjun, LI Xiang. Enhanced heat transfer numerical simulation of tube with twisted tape[J]. Journal of Beijing University of Technology, 2009,35(5): 652-658.
[8] FABBRI G. Heat transfer optimization in internally finned tubes underlaminar flow conditions [J]. International Journal of Heat and Mass Transfer, 1998, 41(97): 1243-1253.
[9] YU B, NIE J H, WANG Q W. Experimental study on the pressure drop and heat transfer characteristics of tubes with internal wavelike longitudinal fins [J]. Heat Mass Transfer, 1999, 35(1): 65-73.
[10] PAPADOPOULOS P K, HATZIKONSTANTINOU P M. Numerical study of laminar fluid flow in a curved elliptic duct with internal fins [J]. International Journal of Heat and Fluid Flow, 2008, 29(2): 540-544.
[11] HSAN D, HAKAN F, AHMET Z ??塁. An analysis of entropy generation through a circular duct with different shaped longitudinal fins for laminar flow [J]. International Journal of Heat and Mass Transfer, 2005, 48(1): 171-181.
[12] LIU L, LING X, PENG H. Complex turbulent flow and heat transfer characteristics of tubes with internal longitudinal platerectangle fins in egr cooler [J]. Applied Thermal Engineering, 2013, 54(1): 145-152.
[13] ZHANG J F, LI B, HUANG W J. Experimental performance comparison of shellside heat transfer for shellandtube heat exchangers with middleoverlapped helical baffles and segmental baffles [J]. Chemical Engineering Science, 2009, 64(8): 1643-1653.
[14]邓荣华,刘迎新,张凌,等.乙二醇水体系的理化性质研究[J].内蒙古工业大学学报:自然科学版,2009(02): 106-112.
DENG Ronghua, LIU Yingxin, ZHANG Ling, et al. Physical and chemical properties of ethylene glycol water system [J] Journal of Inner Mongolia University of Technology∶Natural Science Edition, 2009(02): 106-112.
[15]张晓屿,刘志春,刘伟.内置螺旋片的强化传热管的数值模拟研究[J].工程热物理学报,2011,32(03): 448-450.
Zhang Xiaoyu, Liu Zhichun, Liu Wei. Numerical simulation of enhanced heat transfer tube with internal spiral [J]. Journal of Engineering Thermophysics, 2011(03): 448-450.
[16]张琳,钱红卫,宣益民,等.内置扭带换热管三维流动与传热数值模拟[J].机械工程学报,2005,41(07): 66-70.
ZHANG Lin, QIAN Hongwei, XUAN Yimin. Three dimensional flow and heat transfer numerical simulation of a twisted tape in a internal heat transfer [J]. Journal of Mechanical Engineering, 2005,41(07): 66-70.
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