Interaction of CO2-laser beam with argon plasma of gas tungsten arc
Interaction of CO2-laser beam with argon plasma of gas tungsten arc
复制标题
DOI：
10.1007/s40194-015-0236-1
复制
发表时间：
2015-05
影响因子：
2.1
通讯作者：
U. Reisgen;A. Zabirov;I. Krivtsun;V. Demchenko;I. Krikent
中科院分区：
文献类型：
--
作者：
U. Reisgen;A. Zabirov;I. Krivtsun;V. Demchenko;I. Krikent
建立了水冷阳极钨极气体保护弧柱等离子体和阳极区在聚焦激光作用下沿弧柱传播的能量、质量和电荷传递过程的自组织数学模型。该模型是对连续波CO2激光器发射的高斯束辐射与静止GTA的Ar等离子体相互作用过程进行详细数值分析的基础。确定了聚焦激光辐射的附加局部加热改变了弧柱等离子体的热特性和电磁特性。研究了激光在弧光等离子体中的吸收和折射对激光束特性及其在阳极金属表面的热效应的影响。激光加热电弧等离子体还会导致近阳极弧等离子体中温度、电位和电流密度空间分布的重新排列，从而改变其对阳极表面热冲击的分布性和整体性。
A self-consisted mathematical model was proposed for energy, mass, and charge transfer processes in the arc column plasma and anode region of gas tungsten arc (GTA) with water-cooled anode under the influence of a focused laser beam, propagating along the arc column. This model was the basis for performing detailed numerical analysis of the interaction processes between Gaussian beam radiation emitted by a continuous-wave CO2-laser and the argon plasma of a stationary GTA. It was determined that additional local heating by focused laser radiation changes the thermal and electromagnetic characteristics of the arc column plasma. The influence of laser radiation absorption and refraction in the arc plasma on the characteristics of the laser beam and its thermal effect on the anode metal surface was studied. Laser heating of the arc plasma also leads to a rearrangement of spatial distributions of temperature, electric potential and current density in the near-anode arc plasma, thus changing the distributed and integral characteristics of its thermal impact on the anode surface.