激光介质温度场及应力场的流固耦合数值模拟

发布时间：2018-02-10 02:26

本文关键词： 激光器数值模拟流固耦合热变形　出处：《中国激光》2017年08期 　论文类型：期刊论文

【摘要】：激光介质的热效应会导致固体激光器在工作过程中产生像差,造成激光光束质量下降,严重影响了固体激光器的发展与应用。以一种固体激光器用微通道双面冷却系统为研究对象,建立其三维物理模型,采用流固耦合方法模拟冷却系统的流场、温度场及介质应力场,并考察了流动雷诺数与Nd…YAG晶体薄片内部热流量对薄片热变形的影响。结果表明,冷却系统内流场对薄片温度场及应力场的影响不可忽略;薄片的最大Von Mises等效应力出现在边缘位置,且随着雷诺数的增大而减小;薄片的热变形因流动状态的变化而存在不同的分布形式;热流量只对薄片热变形的程度有影响,热流量越大,薄片的热变形越大。
[Abstract]:The thermal effect of laser medium will result in solid laser aberration in the work process, resulting in a decline in the quality of the laser beam, a serious impact on the development and application of solid state lasers. In a solid state laser with double microchannel cooling system as the research object, establish the three-dimensional physical model, the numerical simulation of cooling system fluid solid coupled method medium, temperature field and stress field, and the effects of Reynolds number and Nd... Effect of YAG crystal internal heat flux on the thermal deformation of the sheet. The results show that the flow field in the cooling system and the influence of the temperature field can not be ignored on the thin sheet; maximum Von Mises equivalent stress appears in the edge position, and decreases with the increase of Reynolds number; the thermal deformation and distribution of sheet form different due to changes in flow state; heat flow only affects the thermal deformation of the sheet, the heat flow is larger, the thermal deformation of sheet is greater.

【作者单位】：大连理工大学化工与环境生命学部;中国科学院大连化学物理研究所;
【分类号】：TN248.1

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