光学精密工程2017，Vol.25Issue(2)：351-357,7.DOI:10.3788/OPE.20172402.0351
切向气流作用下激光辐照对尼龙材料的热烧蚀规律
Thermal ablation law of laser irradiation on nylon materials under tangential airflow
摘要
Abstract
To study the influence of tangential flow on laser damage of slow small targets,a research on the effect of tangential airflow on laser ablation in the process of laser irradiation on a typical low slow small target material of nylon 66 was achieved experimentally and in simulation.The physical model of laser ablation on nylon 66 was established.Based on the model,the temperature field distribution and ablation morphology of nylon materials for 4 s and 1.5 s laser irradiation with and without tangential airflow recorded by a thermal infrared imager were analyzed.The experimental results show that the effect of tangential airflow on the process of laser ablation of nylon 66 is divided into two main stages:in the irradiation early stage,the tangential airflow slows down the thermal increase of nylon 66 materials under laser irradiation,thus restraining the laser ablation of nylon material;However,with the rise of temperature,the increase of the thermal decomposition products leads to laser shielding effect enhancement,thus the tangential flow reduces the attenuation of thermal decomposition products on the surface of target materials to laser and can provide more oxygen for ablation of nylon material.Finally,the process of laser ablation on nylon was simulated by ANSYS.The simulation results are in good a greement with the experimental results,which verifies the reliability of the theory.关键词
激光烧蚀/激光辐照/热烧蚀/尼龙66/切向气流/ANSYS仿真Key words
laser ablation/laser irradiation/thermal ablation/nylon 66/tangential airflow/ANSYS-simulation分类
信息技术与安全科学引用本文复制引用
蒙文,张文杰,李云霞,方英武,韩晓飞..切向气流作用下激光辐照对尼龙材料的热烧蚀规律[J].光学精密工程,2017,25(2):351-357,7.基金项目
国家自然科学基金资助项目(No.61471387) （No.61471387）
陕西省科技计划项目资助课题(No.2013K07-17) （No.2013K07-17）
