Wu Di-Hai, Zah Chung-En, Liu Xingsheng
Appl Opt. 2019 Mar 10;58(8):1966-1977. doi: 10.1364/AO.58.001966.
Numerical and analytical methods are employed to investigate the thermal and fluid flow performance of a microchannel heat sink for cooling a high-power diode laser bar. Heat transfer characteristics and pressure drop in the microchannel under different flow rates are studied. A thermal resistance network, which is proved to have less than 5.4% error, is proposed to characterize the resistance components for the microchannel heat sink. Both numerical modeling and thermal resistance network analysis are verified by experimental results based on the wavelength shift method. Two new heat sinks with more uniform temperature distribution for laser emitters compared with the existing design are presented, and their performance is validated by numerical modeling and spatially resolved spectrum measurements.
采用数值和解析方法研究了用于冷却高功率二极管激光棒的微通道散热器的热性能和流体流动性能。研究了不同流速下微通道内的传热特性和压降。提出了一种热阻网络来表征微通道散热器的电阻元件，其误差小于5.4%。基于波长位移法的实验结果验证了数值模拟和热阻网络分析。提出了两种新型散热器，与现有设计相比，激光发射器的温度分布更均匀，并通过数值模拟和空间分辨光谱测量验证了它们的性能。
