天津工业大学学报2017，Vol.36Issue(3)：54-59,6.DOI:10.3969/j.issn.1671-024x.2017.03.011
LED镁合金散热器的多尺寸翅片设计与性能分析
Design and analysis of magnesium alloy heat sink with multi-sized fins for LED application
摘要
Abstract
In order to obtain lightweight heat sink for high-power LED application, a new magnesium alloy heat sink with multi-sized fins was designed in this paper. A regular morphology heat sink, which had same surface area as multi-sized fins heat sink, was provided as a referential sample. The heat dissipation performance of two above mentioned heat sinks were contrastively analyzed, including temperature field and fluid field, which were simu-lated using software ICEPAK. The results show that short-low fins become lighter in weight which can also reduce the impediment to natural convection from lateral fins at the same time, and short-high fins and long-low fins can extend air flow distance along its length and height. Besides, the air velocity at the cross section in the mid-dle of heat sink with multi-sized fins along the x axis and y axis are separately increased by 18%and 9.4%, and its global maximum temperature is reduced by 2℃. It is proved that the magnesium alloy heat sink with multi-sized fins in natural convection has obvious advantages in improving heat dissipation performance. Finally the test sample was fabricated in terms of the new structure heat sink, and temperature data of key measurement points were obtained by experimental test. Via calculation the results indicates that the experimental data agree well with the simulation ones, and the maximum relative error is less than 8.6%, the chip junction temperature under max supply current is much less than its limit value. Therefore, the magnesium alloy heat sink with multi-sized fins can satisfy the heat dissipation requirement.关键词
LED/镁合金/散热/多尺寸翅片Key words
LED/magnesium alloy/heat dissipation/multi-sized fins分类
信息技术与安全科学引用本文复制引用
牛萍娟,蒋怡娜,张建新,李海林,马楷,吴稀勇..LED镁合金散热器的多尺寸翅片设计与性能分析[J].天津工业大学学报,2017,36(3):54-59,6.基金项目
国家自然科学基金面上项目(51577132) （51577132）
中小企业发展专项资金(SQ2013ZOA100010) （SQ2013ZOA100010）
