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以跨音速风洞为平台,开展了表面亚音速气流环境下,连续激光辐照碳纤维复合材料实验研究。研究表明,无气流时,喷出的热分解产物会降低激光能量透过率;有气流时,气流快速带走热分解产物,并对基体分解后裸露的碳纤维材料进行冲刷和剥离,加速了材料的烧蚀。表面亚音速气流的加载有利于激光对碳纤维复合材料的破坏,且马赫数越大越有利;在激光总能量不变的情况下,适当降低激光功率密度,延长激光作用时间,有利于激光对碳纤维复合材料的破坏。
A cross-sonic wind tunnel was used as a platform to conduct an experimental study of continuous laser irradiation of carbon fiber composite under surface subsonic airflow. The results show that in the absence of airflow, the thermal decomposition products emitted will reduce the laser energy transmittance. When the airflow is flowing, the airflow will quickly take away the thermal decomposition products and scour and peel bare carbon fiber material after matrix decomposition, accelerating the material Ablation. The loading of surface subsonic airflow is beneficial to the laser damage to the carbon fiber composites, and the larger the Mach number, the more favorable the laser energy density is. When the total laser energy is constant, reducing the laser power density and prolonging the laser action time is advantageous for the laser to carbon fiber composite Material damage.