Delay of wetting propagation during jet impingement quenching for a high temperature surface
Delay of wetting propagation during jet impingement quenching for a high temperature surface
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DOI：
10.1016/j.ijheatmasstransfer.2005.06.034
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发表时间：
2005-12
影响因子：
5.2
通讯作者：
A. Mozumder;M. Monde;P. Woodfield
中科院分区：
文献类型：
--
作者：
A. Mozumder;M. Monde;P. Woodfield
用过冷水射流对表面初始温度为250~400 ° C的铜、黄铜和钢的热圆柱体进行淬火时的瞬态传热进行了实验研究。射流速度为3~15m/s，射流过冷度为5~80K，射流直径为2mm。当射流冲击热表面时，润湿前缘在润湿整个表面之前在小的中心区域停滞一定时间。这种润湿延迟可以描述为停留时间，其是块材料和射流过冷度的强函数，也是块初始温度和射流速度的函数。提出了湿锋停留时间和停留时间处表面温度的新关联式。
Transient heat transfer has been investigated experimentally with a subcooled water jet during quenching of hot cylindrical blocks made of copper, brass and steel for initial surface temperatures from 250 to 400°C. The jet velocity was from 3 to 15m/s and jet subcooling from 5 to 80K with a jet diameter of 2mm. When the jet strikes the hot surface, the wetting front becomes stagnant for a certain period of time in a small central region before wetting the entire surface. This wetting delay may be described as the resident time which is a strong function of block material and jet subcooling and also a function of initial block temperature and jet velocity. New correlations for the resident time and the surface temperature at the resident time at the wetting front have been proposed.