基于场协同原理的横排锯齿翅片湍流传热强化机理  

Heat transfer enhancement mechanism of transverse direction type serrated fin in turbulent flow based on field synergy principle

作　　者：李娟[1,2] 凌祥[1] 彭浩[1] 

机构地区：[1]南京工业大学机械与动力工程学院,南京211816 [2]南京林业大学机械电子工程学院,南京210037

出　　处：《航空动力学报》2015年第10期2376-2383,共8页Journal of Aerospace Power

基　　金：江苏省普通高校研究生科研创新计划项目(CXZZ12_0419);国家自然科学基金(51506098);国家科技支撑计划(2012BAA07B02);江苏省高校自然科学基金(15KJB470007);江苏省过程强化与新能源装备技术重点实验室(南京工业大学)开放课题;南京林业大学科研启动项目

摘　　要：通过数值模拟方法分析了横排(TD)锯齿翅片在板翅换热器通道内传热与流动特性.研究了湍流条件下横排锯齿翅片的温度场,速度场以及两场协同性,探索其强化传热机理.在此基础上获得了翅片高度,翅片间距和翅片宽度对传热与流动的影响规律,并给出了横排锯齿翅片的综合传热性能因子.结果表明:横排锯齿翅片通道内流体扰动强烈,形成了周期性纵向涡流;改善了通道内速度与温度梯度场之间的协同作用,强化传热效果,提高了综合传热性能因子.The heat transfer and flow characteristics of TD （transverse direction） type serrated fin in plate-fin heat exchanger were studied numerically. To explore the heat trans- fer enhancement mechanism of TD type serrated fin, three dimensional numerical model was established to examine the temperature gradient field, velocity field and fields synergy in tur- bulence flow. Furthermore the effect of fin height, fin space and fin width on the heat trans- fer and flow characteristics were analyzed respectively. The integrated heat transfer perform- ance factor were calculated. Results show that： the temperature field and velocity distribu- tion was uniform; periodic longitudinal vortex was formed because of the fin strong disturb- ance; the synergy of velocity field and temperature gradient was improved owing to vortex enhancing the heat transfer efficiency and improving integrated heat transfer performance factor.

关 键 词：横排锯齿翅片 场协同 传热强化 湍流 纵向涡流 

分 类 号：V231.1[航空宇航科学与技术—航空宇航推进理论与工程]