摘要
对一种高功率LED散热用封闭微喷射流系统开展了初步的实验测试,测试结果和简单的数学分析表明实验用微喷系统有较大的改进空间。为了改进该系统,利用数值模拟开展微喷结构优化。首先将模拟结果与实验结果进行比较,证明了该模拟模型的可行性。然后通过该数值模型对包括实验用微喷结构在内的二种结构形式的微喷系统开展了模拟分析,寻找到一种较为合理的散热系统结构形式。结果表明:采用流体单进双出的结构形式可使得射流更均匀,与现有方式相比,该冷却系统作用下的芯片最高温度可降低23 K之多。
Preliminary experimental tests on a close-looped micro jet cooling system for high power LEDs were conducted. The test results and simple analysis demonstrate that the system have room for improvement. In order to improve the system, numerical simulation was used for structrual optimization. The simulation model was compared with the experimental results to prove the feasibility of this model. By using the simulation model, two kinds of micro jets were investigated, it is found that the micro jet that has one single inlet and two outlets can achieve good cooling effect. Compared with the present cooling system in the experimental prototype, the maximal temperature of LED substrate cooled by the optimized micro jet cooling system was 23 K lower.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2008年第11期1909-1914,共6页
Journal of Engineering Thermophysics
基金
湖北省科技攻关计划资助项目(No.2006AA103A04)
关键词
高功率LED
微喷射流
热分析
结构优化
high power LED
micro jet
thermal analysis
structural optimization
