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中文摘要：
对抽运及冷却中发生的流动、对流扩散及瞬态热传导等现象的耦合作用过程,用多物理场耦合分析方法,建立了计算激光晶体温度分布的流-热-固耦合模型。应用有限单元法,对受高功率重复脉冲抽运的片状激光晶体进行瞬态温度场数值模拟。排除了不精确的换热系数对计算结果的影响,并为评价流速、流道形状等因素对冷却效果的影响,从而为改进冷却方式降低激光晶体的热效应提供了可靠的分析方法。
英文摘要：
For the coupled effects of the fluid flow,convective-diffusive and transient thermal conduction happened in the process of pumping and cooling,a flow-thermal-solid interaction model for calculating the temperature distribution in the laser crystal has been established based on the coupled analysis of multi-physics fields.The transient temperature distribution of a laser slab pumped by high-power repetitive pulses is obtained by using the finite element method.The proposed method precludes the influence of the inaccurate film coefficient of the cooling water on the calculation results.Therefore,for the purpose of reducing the thermal effects in the laser crystals,it provides a new effective way to assess and improve the cooling process.
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同项目期刊论文
Influence of the high-repetition-pulsed laser beam size on the damage characteristics of absorbing g
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