摘要
发光二极管(LED)以其耗电量少、发光效率高、节能、环保等特点,在现代照明中已经越来越占据主导地位。LED芯片产生的热量随着功率增加而增加,使得基底温度升高,所以散热问题成为LED设计时需要考虑的重要因素之一。本文在对现有的LED肋片散热器结构进行数值分析的基础上,提出了断开开缝式肋片的结构,并对其进行了研究分析。结果表明,在自然对流的情况下,表面传热系数和总热阻受功率影响很小,断开式结构可以提高表面传热系数,但存在最佳开缝数。
As its high luminous efficiency, energy-saving, environmental protection and other characters, Light-emitting diode （LED） has been more and more dominant in the modern lighting. The more chip heat will be generated as the higher power, so the thermal problem has been one of the major factors. The sub- sectioned plain plate fin structure has been putted forward and analyzed by the numerical method. The result shows that the heat transfer coefficient and the thermal resistance rarely depend on the power input in the natural convection condition. The sub-sectioned plain plate fin can improve the heat transfer coefficient, but there has an optimum number for slotting.
出处
《照明工程学报》
2014年第1期94-97,共4页
China Illuminating Engineering Journal
基金
江苏省2013年度普通高校研究生科研创新计划项目(CXLX13_714)
关键词
LED
数值分析
结构优化
LED
numerical simulation
boundary layer
