纵向肋间距对微针肋散热器流动传热特性影响的模拟研究  

Simulation Study on the Effect of Vertical Pin Spacing on Thermal-Hydraulic Characteristics of Micro-Pin-Fin Heat Sinks

作　　者：许浩榕 孙欢[1] 朱宏伟 腾信波 Xu Haorong;Sun Huan;Zhu Hongwei;Ten Xinbo(Tianjin Key Laboratory of Refrigeration Technology of Tianjin University of Commerce,Tianjin,300134,China)

机构地区：[1]天津商业大学天津市制冷技术重点实验室,天津300134

出　　处：《冷藏技术》2022年第2期43-51,共9页Journal of Refrigeration Technology

摘　　要：针肋排布方式和针肋间距对微针肋翅片散热器的流动及传热特性会产生巨大影响。本文在定热流密度条件下,以去离子水为冷却介质,数值模拟研究了10种具有不同针肋排列方式和纵向间距的铜基微针肋翅片散热器在不同质量流量下的流动及传热特性。结果表明,对于线型排列微针肋散热器,其进出口压降、摩擦系数等流动特性参数随纵向间距的变化趋势不会受流量影响,而单位面积换热系数和努赛尔数等传热特性参数随纵向间距的变化趋势与流量有关;对于交叉排列微针肋翅片散热器,进出口压降、摩擦系数、单位面积换热系数、努赛尔数和换热面积随纵向间距的减少而升高,致使热阻降低、热工水力性能综合指标升高。The fin arrangement and pin-fin spacing have a huge impact on the flow and heat transfer characteristics of the micro-pinfin heat sinks.In this paper,under the condition of constant heat flux density,deionized water is used as the cooling medium,and the flow characteristics and heat transfer properties of 10 copper-based micro-pin-fin heat sinks with different pin-fin arrangement and longitudinal spacing under different mass flow rates are numerically studied.The results show that for the linearly arranged micropin-fin heat sinks,the change trend of the flow characteristic parameters such as inlet and outlet pressure drop and friction coefficient with the vertical spacing will not be affected by the flow rate,while the variation trend of heat transfer characteristic parameters such as heat transfer coefficient per unit area and Nusselt number with the vertical spacing is related to flow rate.For cross-arranged micro-pin-fin heat sinks,the pressure drop,friction coefficient,heat transfer coefficient per unit area,Nusselt number and heat transfer area of the heat exchanger increase with the decrease of the vertical spacing,resulting in a decrease in the thermal resistance and the comprehensive index of thermal hydraulic performance increased.

关 键 词：微针肋 散热器 纵向肋间距 流动及换热特性 

分 类 号：TK172[动力工程及工程热物理—热能工程] TN03[电子电信—物理电子学]