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首页> 外文期刊>International Journal of Heat and Mass Transfer >Maximum heat flux in relation to quenching of a high temperature surface with liquid jet impingement
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Maximum heat flux in relation to quenching of a high temperature surface with liquid jet impingement

机译：与喷液冲击引起的高温表面淬火有关的最大热通量

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摘要

Experimental investigation has been conducted for quenching of hot cylindrical blocks made of copper, brass and steel with initial block temperature 250-400℃ by a subcooled water jet of diameter of 2 mm. The subcooling was from 5 to 80 K and the jet velocity was from 3 to 15 m/s. After impingement, the jet stagnates for a certain period of time in a small region near the centre and then the wetting front starts moving outwards. During this movement, when the surface temperature at the wetting front drops to 120-200℃, the surface heat flux reaches its maximum value due to forced convection nucleation boiling. The maximum heat flux is a strong function of the position on the hot surface, jet velocity, block material properties and jet subcooling. A new correlation for maximum heat flux is proposed.
机译：通过对直径为2 mm的过冷喷水，对初始温度为250-400℃的铜，黄铜和钢制成的圆柱形热块进行淬火的实验研究。过冷度为5至80 K，射流速度为3至15 m / s。撞击后，射流在中心附近的一个小区域停滞了一段时间，然后润湿的前沿开始向外移动。在此运动过程中，当润湿前沿的表面温度降至120-200℃时，由于强制对流成核沸腾，表面热通量达到最大值。最大热通量是热表面位置，射流速度，块材料性能和射流过冷的强烈函数。提出了一种新的最大热通量相关性。

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