摘要
为降低导光镜面激光辐照区的温度梯度,利用有限体积法求解三维湍流传热方程,得到激光辐照区温度场分布,研究了矩形流道尺寸参数、冷却液的浓度与流速等因素对导光镜面平均温升和温升差的影响,并设计了双流道结构。结果表明,对于单流道,镜面辐照区温度场不随其几何中心呈对称分布,最高温度点位于流道下游;增大流道截面尺寸和冷却液流速可以提高换热效果;流道不同面之间的温度分布并不相同;乙二醇冷却液浓度越高,换热效果越差;相比于单流道结构,双流道结构的平均温升降低幅度最大可达17.79%,温升差降低幅度最大可达67.97%。
In order to reduce the temperature gradient of the laser irradiation zone of the light guide mirror surface,the three-dimensional steady turbulent flow and heat transfer equations are solved with the finite volume method,and the temperature field of the laser irradiation zone is analyzed.The effects of rectangular channel size,concentration and velocity of coolant on average temperature rise and temperature rise difference of the light guide mirror surface are studied.Accordingly,a dual-channel structure is designed.Results show that for the single channel,the temperature field of the irradiation zone is not symmetrical around the geometric center and the highest temperature point is located at the downstream of the irradiation zone.The heat transfer efficiency can be improved by the increase of the cross-section size and the coolant velocity.In addition,the temperature distributions between the different surfaces of the channels are not the same.The higher the concentration of the ethylene glycol coolant,the worse the heat transfer effect.The average temperature and the temperature rise difference of the dual-channel structure can be reduced by up to 17.79% and 67.97%,respectively,compared with those of the single-channel structure.
作者
孟令武
邵帅
Meng Lingwu Shao Shuai(Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun Jilin 130033, China University of Chinese Academy of Sciences, Beijing 100049, China)
出处
《中国激光》
EI
CAS
CSCD
北大核心
2017年第10期30-37,共8页
Chinese Journal of Lasers
基金
中国科学院长春光学精密机械与物理研究所三期创新工程资助项目(09J52SCN90)
关键词
激光光学
强激光
导光镜
温度场
计算流体力学
laser optics
high power laser
light guide mirror
temperature field
computational fluid dynamics
