论文部分内容阅读
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。
The thermal effect of the laser medium can cause the solid-state laser to produce aberrations in the working process, resulting in a decrease of the laser beam quality, which seriously affects the development and application of the solid-state laser. A solid-state laser microchannel double-sided cooling system is taken as the research object, and its three-dimensional physical model is established. The fluid-solid coupling method is used to simulate the flow field, the temperature field and the medium stress field of the cooling system. Influence of Heat Flow Inside YAG Crystal Sheet on Hot Deformation of Thin. The results show that the influence of the flow field in the cooling system on the temperature field and the stress field can not be neglected. The maximum Von Mises equivalent stress appears at the edge and decreases with the increase of Reynolds number. The flow state changes and there are different forms of distribution; heat flow only affects the degree of thermal deformation of the sheet, the greater the heat flux, the greater the thermal deformation of the sheet.