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通过数值计算考察了激光诱导的合金元素汽化和表面张力驱动流对加热表面温度分布和最高温度的影响。结果表明 ,当 |σ/T|很小或用纯导热模型计算时 ,汽化热损失对表面温度分布和表面最高温度的影响很大 ,此时汽化热损失是决定表面最高温度的主要因素 ;当 |σ/T| >3 .0× 1.0 -4 N/m2 时 ,汽化热损失的影响很小 ,此时表面张力驱动流是决定表面最高温度的主要因素。
The effect of laser-induced alloying of elements and surface tension-driven flow on the temperature distribution and the maximum temperature of the heating surface was investigated by numerical calculations. The results show that when | σ / T | is small or calculated by pure thermal conductivity model, the heat loss from vaporization greatly affects the surface temperature distribution and the maximum surface temperature. The heat loss is the main factor that determines the maximum surface temperature When | σ / T |> 3.0 × 1.0 -4 N / m2, the influence of heat loss on vaporization is small. The surface tension-driven flow is the main factor that determines the maximum surface temperature.