LED板状肋片散热器性能的方向效应

张建新; 杨庆新; 牛萍娟; 王宁; 蒋怡娜

doi:10.3788/fgxb20153607.0846

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LED板状肋片散热器性能的方向效应

发光学应用及交叉前沿 | 更新时间：2020-08-12

- LED板状肋片散热器性能的方向效应
- Orientation Effects on Heat Dissipation Performance of Plate-fin Heat Sink for LED Application
- 发光学报 2015年36卷第7期页码：846-853
- 作者机构：
  
  1. 天津工业大学天津市电工电能新技术重点实验室天津,300387
  2. 天津工业大学大功率半导体照明应用系统教育部工程研究中心天津,300387
  3. 天津工业大学中空纤维膜材料与膜过程省部共建国家重点实验室天津,300387
- 作者简介：
- 基金信息：
  
  国家自然科学基金(11404239)();科技型中小企业技术创新资金(13ZXCXGX31700)();天津市科技特派员项目(14JCTPJC00542) 资助()
- DOI：10.3788/fgxb20153607.0846
  中图分类号： TN312.8
- 纸质出版日期：2015-7-3，
  
  收稿日期：2015-3-7，
  
  修回日期：2015-5-11，
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张建新, 杨庆新, 牛萍娟等. LED板状肋片散热器性能的方向效应[J]. 发光学报, 2015,36(7): 846-853

ZHANG Jian-xin, YANG Qing-xin, NIU Ping-juan etc. Orientation Effects on Heat Dissipation Performance of Plate-fin Heat Sink for LED Application[J]. Chinese Journal of Luminescence, 2015,36(7): 846-853
张建新, 杨庆新, 牛萍娟等. LED板状肋片散热器性能的方向效应[J]. 发光学报, 2015,36(7): 846-853 DOI： 10.3788/fgxb20153607.0846.

ZHANG Jian-xin, YANG Qing-xin, NIU Ping-juan etc. Orientation Effects on Heat Dissipation Performance of Plate-fin Heat Sink for LED Application[J]. Chinese Journal of Luminescence, 2015,36(7): 846-853 DOI： 10.3788/fgxb20153607.0846.

摘要

为考察装配板状肋片散热器的多角度照射型LED灯的自然对流散热性能的方向效应

以一款LED投光灯的关键散热结构为研究对象

采用实验测量法验证数值模拟的计算精度

并将数值模拟的温度和流体数据用于分析3种驱动电流和7个出光倾角下最大温升和温度均匀性的散热机制。结果表明:不同倾角下的散热器肋间风道内的流速分布的较大差异

是导致最大温升和温度均匀性变化的根本原因;最高温度点的上、下游流速的差值可用于定量解释温度均匀性的变化规律。不同倾角下肋片间距对最大温升的影响趋势表明:最佳间距附近的散热器性能对倾角的敏感度最高

散热能力的方向效应不容忽视。

Abstract

The plate-fin heat sink is widely used in LED lamp for application of multi-angle illumination. According to the key structures of a LED projection lamp

the orientation effects on heat dissipation performance of plate-fin heat sink with natural convection cooling were researched under 3 driving currents and 7 inclination angles between illumination direction and gravity direction. Based on the validity and accuracy of numerical simulation verified by experimental results

the thermal mechanisms with respect to maximum excess temperature and temperature uniformity were investigated through analyzing temperature and flow data derived from numerical simulation. The obvious differences of air velocity distribution in the flow channel of fins are found among inclination angles

these differences are the main reason of sensitive orientation effect about maximum excess temperature and temperature uniformity. In addition

air velocity difference between upstream and downstream around the measuring point with maximum temperature can be used to quantitatively interpret the variation trend of temperature uniformity in different inclination angles. Furthermore

the effects of inclination angle and fin spacing on the maximum excess temperature were analyzed. The results show that the heat dissipation performance of plate-fin heat sink with optimal fin spacing has high orientation sensitivity

so the study of orientation effects on the air flow and heat transfer of plate-fin heat sinks is an indispensable task in the thermal design of LED with multi-angle illumination function.

关键词

LED散热自然对流板状肋片散热器数值模拟倾角

Keywords

LED coolingnatural convectionplate-fin heat sinknumerical simulationinclination angle

references

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