强激光作用下导光镜面温度场的影响因素分析

发布时间：2018-02-22 15:56

本文关键词： 激光光学强激光导光镜温度场计算流体力学　出处：《中国激光》2017年10期 　论文类型：期刊论文

【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%。
[Abstract]:In order to reduce the temperature gradient in the laser irradiated area of light guide mirror, the three-dimensional turbulent heat transfer equation was solved by the finite volume method, and the temperature field distribution in the laser irradiated area was obtained. The size parameters of the rectangular channel were studied. The effects of the concentration and flow rate of the coolant on the average temperature rise and the temperature rise difference of the light guide mirror are studied. The results show that for the single channel, the temperature field does not distribute symmetrically with the geometric center. The maximum temperature point is located downstream of the channel, the heat transfer effect can be improved by increasing the channel cross section size and coolant flow rate, the temperature distribution between different surfaces of the channel is different, the higher the concentration of ethylene glycol coolant is, the worse the heat transfer effect is. Compared with the single channel structure, the maximum decrease range of the average temperature rise of the double channel structure can be as high as 17.79, and the maximum decrease of the temperature rise difference can be as high as 67.97.
【作者单位】：中国科学院长春光学精密机械与物理研究所;中国科学院大学;
【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)
【分类号】：TN24

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