磁场作用下翼形肋柱微通道流动换热性能研究  

Study on the flow and heat transfer performance of wing fin column microchannels under magnetic field

作　　者：张锁程 商维佳 刘志刚 Zhang Suocheng;Shang Weijia;Liu Zhigang(School of Mechanical and Electrical Engineering and Transportation Engineering,Nantong College of Science And Technology,Nantong 226007,China;School of Mechanical and Control Engineering,Guilin University of Technology,Guilin 541004,China)

机构地区：[1]南通科技职业学院机电与交通工程学院,南通226007 [2]桂林理工大学机械与控制工程学院,桂林541004

出　　处：《低温与超导》2025年第2期104-110,共7页Cryogenics and Superconductivity

基　　金：国家自然科学基金(52075110,61961011);南通科技职业学院科研基金项目(KY202407)资助。

摘　　要：基于仿生原理,通过分析飞机机翼截面设计了一种具有翼形肋柱微结构的微通道换热器,并探讨磁场强度和翼形肋柱类型对微通道流动换热性能的影响,以Fe_(3)O_(4)-H_(2)O纳米流体为流体工质,以凹凸型、对称型、平凸型、双凸型四种翼形肋柱微通道热沉为研究对象,采用数值模拟的方法,模拟流体工质运动过程。结果表明:增大磁场强度能显著提升微通道的换热性能,平均努塞尔数最高提升5.46%,但同时也会提升系统的进出口压降;翼形肋柱的加入确实可以有效的提高微通道的综合换热性能;当磁场强度为0.5~5 T时,翼形肋柱的类型存在最优值,双凸型翼形肋柱微通道的综合换热性能最佳,比其他翼形高4.46~12.88%。Based on the principle of biomimicry,a microchannel heat exchanger with a wing-shaped rib column micro-structure was designed by analyzing the wing section of an airplane.The influence of magnetic field strength and the impact of wing-shaped fin columns on the thermal transfer efficiency within microchannels was discussed,with Fe,O4-H,O nano fluid as the working fluid,and the four types of wing-shaped rib column microchannel heat sinks,namely concave-convex,symmetri-cal,convex-convex,and double-convex,as the research objects.Numerical simulation techniques were employed to model the fluid dynamics process.The results show that increasing the intensity of the magnetic field can substantially enhance the heat transfer efficiency within the microchannel,with the average Nusselt number being increased by 5.46%.However,it would also increase the systems inlet and outlet pressure drops.The addition of wing-shaped rib columns can significantly enhances the thermal transfer efficiency within the microchannel.When the magnetic field strength varies between 0.5 T and 5 T,there exists an optimal value for the type of wing-shaped rib column.The comprehensive heat transfer performance of the double-convex wing-shaped rib column microchannel is found to be superior,which is 4.46~12.88%higher than that of the other wing-shaped rib columns.

关 键 词：微通道 翼形肋柱 磁场作用 数值模拟 

分 类 号：TK124[动力工程及工程热物理—工程热物理]