Determination of the local quench curve for spray-cooled metallic surfaces
Determination of the local quench curve for spray-cooled metallic surfaces
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DOI：
10.1007/bf02833195
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发表时间：
1989-09
期刊：
影响因子：
--
通讯作者：
I. Mudawar;W. S. Valentine
中科院分区：
文献类型：
--
作者：
I. Mudawar;W. S. Valentine
在表面温度低于400℃的淬火曲线的单相沸腾、核沸腾和过渡沸腾状态下，对热金属表面到水喷雾的换热进行了实验研究，并在喷雾场中用0.5cm2的加热器进行了局部换热测量。在喷雾场中与加热器相同的位置，独立测量了喷雾的流体力学性质，如液滴直径、液滴速度和体积喷雾流量。试验条件包括体积流量、质量平均液滴直径和平均液滴速度的变化，分别为0.434×10-3~9.96×10-3m3s-1/m2、0.434~2.005 mm和10.6~26.5m/S。给出了从23°C到80°C的水温关联式。这些关联式构成了开发材料加工中常用的工业喷雾的淬火曲线的通用方法。
An experimental study of heat transfer from hot metallic surfaces to water sprays was conducted in the single-phase, nucleate boiling, and transition boiling regimes of the quench curve for surface temperatures below 400° C. Heat transfer measurements were made locally in the spray field using a heater surface area of 0.5 cm2. The hydrodynamic properties of the sprays such as drop diameters, drop velocities, and volumetric spray flux were also measured independently at a position in the spray field identical to that of the heater. The test conditions included variations in volumetric spray flux, mass mean drop diameter, and mean drop velocity of 0.6 × 10-3to 9.96 × 10-3m3s-1/m2, 0.434 to 2.005 mm, and 10.6 to 26.5 m/s, respectively. Correlations are presented for water temperatures from 23 to 80° C. These correlations constitute a universal approach to the development of quench curves for industrial sprays commonly employed in materials processing.