强激光与粒子束, 2014, 26 (7): 071001, 网络出版: 2014-06-30
高功率二极管激光器喷雾冷却实验研究
Spray cooling of high power diode laser
二极管激光器 热管理 喷雾冷却 微结构表面 强化换热 diode laser thermal management spray cooling micro-structured surfaces heat transfer enhancement
摘要
通过以液氨为制冷工质的开式喷雾冷却系统,在相同实验条件下研究了二极管激光器(DL)热沉喷雾表面分别为光滑表面、均匀密排微孔、深孔和多孔表面结构时的冷却效果,实验结果表明: 在热流密度达到300 W/cm2时,冷却表面温度均保持在28 ℃以内,适用于高热流密度下的DL热管理问题; 喷雾表面均布微结构能显著强化喷雾冷却性能,当采用均匀密排多孔表面时,散热功率达511.5 W/cm2,对流传热系数为346 701.1 W/(m2·℃),传热系数较光滑表面时提高了83.9%。
Abstract
Spray cooling experiments were performed on the heater with different micro-structured surfaces. A smooth surface was also tested for comparison. The micro-structures consisted of uniform porous tunnels with different size, and tests were conducted in an open system with ammonia as the working fluid. When the heat flux was 300 W/cm2, the surfaces temperature was kept below 28 ℃. This result indicated that ammonia was a optional fluid for diode laser cooling application. Moreover, the uniform micro-structured surfaces offered significant performance enhancement of heat transfer. At 511.5 W/cm2, heat transfer coefficient reached to 346 701.1 W/(m2·℃) which corresponded to 83.9% increase over smooth surface.
杨波, 高松信, 刘军, 王宏. 高功率二极管激光器喷雾冷却实验研究[J]. 强激光与粒子束, 2014, 26(7): 071001. Yang Bo, Gao Songxin, Liu Jun, Wang Hong. Spray cooling of high power diode laser[J]. High Power Laser and Particle Beams, 2014, 26(7): 071001.