烟囱式LED散热器的自然对流散热研究  

Study on A Chimney LED Heat Sink Subject to Natural Convective Heat Transfer

作　　者：李斌[1,2] 唐瑜梅 涂朴 LI Bin TANG Yumei TU Pu(Dazhou Industrial Technology Institute of Intelligent Manufacturing, Sichuan University of Arts and Science, Dazhou 635000, China School of intelligent manufacturing, Sichuan University of Arts and Science, Dazhou 635000, China)

机构地区：[1]四川文理学院智能制造产业技术研究院,四川达州635000 [2]四川文理学院智能制造学院,四川达州635000

出　　处：《照明工程学报》2017年第4期106-109,共4页China Illuminating Engineering Journal

基　　金：四川文理学院科研项目资助(项目编号:2016KZ009Y)

摘　　要：圆形LED散热器是近几年的研究热点。我们对一般圆形散热器和烟囱式散热器进行了建模,运用有限体积法(FVM)进行了数值仿真,讨论了翅片个数和烟囱高度对散热器的影响。仿真结果表明,翅片个数和烟囱高度均对散热器的热性能影响显著,并存在最优的翅片个数和烟囱高度。通过对两种散热器的温度比较得知烟囱式散热器可加快散热,提高换热效率。对翅片个数和烟囱高度进行了最优化设计,结果显示优化后的烟囱散热器在热性能上比原有的圆形散热器提升了20%。Radial heat sinks are studied frequently recent years. In this study,a general radial heat sink and a new radial heat with a cylinder which named chimney heat sink are investigated. We studied the two kinds of heat sinks by simulation subject to finite volume method（ FVM）. The effects of fin number and cylinder height on the thermal performance of heat sinks are investigated. The results indicate that cylinder height and fin number affect the thermal performance significantly. There exist an optimal fin number and cylinder height. Radial heat sinks with a cylinder can enhance heat dissipation due to its chimney effect.Optimizations of cylinder height and fin number were done in this work. The optimal chimney heat sink enhances the thermal performance up to 20% by comparing to the previous heat sink.

关 键 词：散热器 自然对流 烟囱效应 LED 散热 照明 

分 类 号：TK172[动力工程及工程热物理—热能工程] TM923.34[电气工程—电力电子与电力传动]