介绍了半导体激光器外部散热设计的数值模拟方法计算流体力学(CFD)方法。对于流体固体耦合传热问题, 建立对流导热耦合传热模型和质量守恒、能量守恒、动量守恒以及k-ε方程联合控制方程组, 按照给定的边界条件, 利用数值方法进行迭代计算, 求解出高精度的数值结果。对一只最大热功耗15 W的半导体激光器的外部散热设计铝合金片状翅片热沉加轴流风扇强制风冷方案, 用CFD方法进行模拟仿真, 数值计算结果表明设计方案可以较好地满足总体热设计要求。

A computational fluid dynamics (CFD) method for semiconductor laser external heat dissipation numerical simulation is introduced. For fluid-solid coupled heat transfer problems, convection-conduction coupled heat transfer model and mass conservation, energy conservation, momentum conversation, k-ε equation governing equations are established; precise numerical solution can be acquired by iterative calculation according to specified boundary conditions. The forced air cooling design for a semiconductor laser (15 W maximum heat load) with external heat dissipation, which consists of an aluminum alloy heat sink and an axial fan, is simulated with CFD method; the result of numerical simulation indicates that the design is applicable for the thermal requirements of the system.