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首页> 外文期刊>Journal of Applied Mechanics and Technical Physics >EFFECT OF THE RECOIL PRESSURE INDUCED BY EVAPORATION ON MOTION OF POWDER PARTICLES IN THE LIGHT FIELD DURING LASER CLADDING
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EFFECT OF THE RECOIL PRESSURE INDUCED BY EVAPORATION ON MOTION OF POWDER PARTICLES IN THE LIGHT FIELD DURING LASER CLADDING

机译：蒸发过程中蒸发引起的回弹压力对光场中粉粒运动的影响

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摘要

A model is proposed, which takes into account acceleration of powder particles by a force induced by recoil of material vapors from the irradiated region of the particle surface. Results of a numerical analysis of heat and mass transfer in the case of motion of individual stainless steel powder particles in a gas flow and in a light field of laser radiation under conditions of laser cladding are presented. Acceleration of particles is found to depend on their diameter, carrier gas velocity, powder material properties, laser radiation power, and degree of attenuation of the power density in the laser beam in the direction of its action on the substrate. The calculated results are compared with experimental data on light-propulsion acceleration of individual particles (of aluminum, aluminum oxide, and graphite) under the action of pulsed laser radiation.
机译：提出了一种模型，该模型考虑了由来自颗粒表面的照射区域的材料蒸气的反冲引起的力引起的粉末颗粒的加速。给出了在激光熔覆条件下，在气流和激光辐射光场中单个不锈钢粉末颗粒运动的情况下，传热和传质的数值分析结果。发现粒子的加速度取决于它们的直径，载气速度，粉末材料的特性，激光辐射功率以及激光束在其作用于基板上的方向上功率密度的衰减程度。将计算结果与有关在脉冲激光辐射作用下单个颗粒（铝，氧化铝和石墨）的光推进速度的实验数据进行比较。

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