为了考察切向强迫气流对激光辐照下树脂基复合材料热响应的影响, 基于边界层换热理论, 研究了切向气流与靶面的对流换热系数和热分解气体对表面热交换的覆盖效应, 并用有限差分法对激光辐照下树脂基复合材料的1维热响应模型进行数值求解。数值计算表明：高速切向气流的存在会加速靶材表面与外部环境的热交换, 从而明显降低激光对靶材的加热效率;边界层换热理论给出的对流换热系数和覆盖因子是合理有效的, 适用于数值模拟切向气流对激光辐照下树脂基复合材料热响应的影响;向靶材表面溢出的热分解气体对靶材表面与外部环境的热交换有一定的抑制作用, 但影响较小, 基本可以忽略不计。

In order to understand the influence of the tangential airflow on the thermal response of resin composite irradiated by laser, the convective heat transfer coefficient and the blanketing effect are studied by the heat transfer theory of boundary layer, and the one-dimensional thermal response model of resin composite irradiated by laser is solved with finite difference method. The simulation results indicate that the high-speed tangential airflow increases the convective heat exchange of the target surface, consequently reduces the heating efficiency of the laser obviously. The convective heat transfer coefficient and the blanketing factor base on the heat transfer theory of boundary layer are proper, and are suitable for numerical simulation of tangential airflow impacting on the thermal response of resin composite irradiated by laser. The pyrolysis gas has slight impact on the heat exchange between the ambient airflow and the target surface. Therefore, the influence of the pyrolysis gas on the heat exchange can be ignored.