Unconstrained quench of medium steel plate adopt round nozzle impinging jet cooling mode, and steel plate is cooled during being pushed ahead.

中厚板无约束淬火主要采用上下集管圆形射流冲击冷却方式，使淬火钢板在向前行进的过程中得到冷却。

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Dry plasma cutting: also called the air-filled type cutting, the air compressor to plank cut in order to achieve the effect of cooling seam jet, such cutting costs low, but pollution is very large.

干式等离子切割：又称风冷式切割，采用空压机对板材割缝喷气以达到冷却效果，此类切割成本较低，但是污染很大。

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The thermal images show truly the features of local heat transfer for each jet impingement cooling.

热图像真实地反映出每一股射流的冲击冷却局部换热特征。

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