用计算流体力学(CFD)方法对传导冷却端面抽运板条(CCEPS)激光器的多种水冷设计方案分别进行了流固耦合传热数值模拟，比较了流固耦合传热模拟和单纯的导热模拟结果的差别，对各种水冷设计方案进行综合比较，研究了冷却通道的尺寸、数量以及冷却水流量等因素对激光板条温度分布以及对热沉的流动阻力特性的影响。一般情况下，减小通道的特征尺寸，增加通道数目和冷却水的流量可以降低固液耦合界面的传热热阻，因此，微通道冷却方式比常规的空腔冷却和小通道冷却显著提高了总传热系数，降低了总热阻，可将发热部分的温度明显降低，但是微通道冷却方式必然造成较大的流动压力损失。

A variety of water cooling designs for conduction cooling end pumped slab (CCEPS) laser are simulated with computational fluid dynamics (CFD) methods. The difference between fluid-solid coupled method and mere heat conduction simulation in gain media is comparatively investigated. The influences of the size, number of the cooling channels and flow rate of the cooling water to the temperature distribution of the slab and the flow resistance characteristics of the heat sink are studied. In general, decreasing of characteristic size, increasing of channel numbers and the flow rate of the cooling water can reduce the thermal resistance between the solid and fluid interface. Thus total heat transfer coefficient is extended to a very high level. That is, total thermal resistance of heat sink can be remarkably reduced with micro-channels cooling structure compared to cavity or mini-channels structure. The temperature level of gain media can be apparently lowered down. However, the pressure loss in heat sink increases significantly.