Optimization design of microchannel heat sink geometry for high power laser mirror

• Published in: Applied thermal engineering Vol. 30; no. 13; pp. 1644 - 1651
• Main Authors: Cao, Haishan, Chen, Guangwen
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.09.2010; Elsevier
• Subjects: Applied sciences; Channels; Cooling; Cooling effects; Deformation; Energy; Energy. Thermal use of fuels; Exact sciences and technology; Heat sink; Heat sinks; Heat transfer; High power lasers; Laser mirror; Microchannel; Microchannels; Theoretical studies. Data and constants. Metering; Water cooling; Laser mirror; Microchannel; Heat sink; Heat transfer; Water cooling; Deformation; Fin; Optimization; Geometry; Cooling water; Laser; Narrow channel; Performance; Mirror; Comparative study
• ISSN: 1359-4311
• DOI: 10.1016/j.applthermaleng.2010.03.022

Microchannel heat sink for high power laser mirror with water cooling was analyzed as a function of microchannel geometry and operation parameters. A comparative analysis of the thermal deformation on the mirror surface without cooling and that with cooling revealed that the maximal thermal deformation on the mirror surface could decrease from about 0.115 μm to around 0.040 μm under the laser power of 200 W/cm 2 by using microchannel heat sink designed. In order to enhance the performance of microchannel heat sink, the effects of channel width, channel depth, fin width, mirror thickness and cooling region were investigated. The results indicated that the heat transfer performance of the microchannel heat sink could be further improved by narrow and deep channel, narrow fin, thin mirror and large cooling region.