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首页> 外文期刊>Journal of Heat Transfer >Temperature Created by a Moving Heat Source That Heats and Melts the Metal Plate (Plasma Arc Cutting)
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Temperature Created by a Moving Heat Source That Heats and Melts the Metal Plate (Plasma Arc Cutting)

机译：由移动并加热金属板的热源产生的温度（等离子弧切割）

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Heat transfer in a metal cut by a moving arc jet is considered using the method of superposition of heat sources and sinks. The heat sources are located at the plasma-liquid metal boundary, heat sinks-at the melting front. Special attention is paid to the influence of the molten metal layer that separates the plasma and not yet molten metal. It is shown that this layer hampers heat transfer to the melting front. Neglecting its heat resistance could lead to a very substantial errors especially at high cutting speeds. The thicker the layer and/or the higher the cutting speed, the more power is necessary to perform the cut and the higher the average temperature of the melt. Estimations show that power carried out by the removed melt could reach half of the total power necessary to make the cut. The suggested method allows one to include the heat of heterogeneous reaction of oxidation at the melting front. The method could be applied to describe other types of metal cutting with a moving concentrated heat source.
机译：使用叠加的热源和热沉的方法来考虑通过移动电弧射流切割的金属中的热传递。热源位于等离子-液态金属边界，热沉位于熔化前沿。要特别注意分离等离子体和尚未熔融金属的熔融金属层的影响。结果表明，该层阻碍了向熔化前沿的传热。忽略其耐热性可能导致非常大的误差，尤其是在高切削速度下。层越厚和/或切割速度越高，执行切割所需的功率就越大，并且熔体的平均温度越高。估计表明，去除的熔体所产生的功率可能达到进行切割所需的总功率的一半。建议的方法允许在熔化前沿包括氧化的异质反应热。该方法可用于描述具有移动集中热源的其他类型的金属切削。

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