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首页> 外文期刊>ISIJ international >Numerical Study on Effect of Nozzle Diameter on Plate Cooling in Run Out Table of Hot Plate Rolling Process
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Numerical Study on Effect of Nozzle Diameter on Plate Cooling in Run Out Table of Hot Plate Rolling Process

机译：喷嘴直径对热轧轧制出炉表冷却的影响的数值研究

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摘要

The design of cooling systems for running hot steel plates has received much attention because the mechanical and/or metallurgical properties of final products are greatly influenced by the cooling capacity of the system. Thus many steel makers have largely concentrated on simply increasing the cooling water supply capacity of the system. Some researchers believe that plate cooling is a type of thermal commu nication between the hot plate and the cooling water or the atmosphere, so they have emphasized the importance of thermal conditions such as the cooling water temperature or air humidity. Actually the cool ing process is governed by the basic physics of boiling heat transfer between the hot steel plate and the cooling water. Therefore steel makers should be more concerned about the influence of the design parameters of cooling facilities on the boiling phenomenon rather than the simple increase of the cooling water flow rate. In this study, when the diameter of the nozzle supplying cooling water is changed, its effect on boiling heat transfer has been investigated numerically. The average heat flux, the Leidenfrost steam-layer thickness, the temperature drop and so on were investigated according to nozzle diameter.
机译：用于运行热钢板的冷却系统的设计受到了广泛的关注，因为最终产品的机械和/或冶金性能受到系统冷却能力的极大影响。因此，许多钢铁制造商主要集中于简单地增加系统的冷却水供应能力。一些研究人员认为，板冷却是热板与冷却水或大气之间的一种热交换，因此他们强调了热条件（如冷却水温度或空气湿度）的重要性。实际上，冷却过程是由热钢板和冷却水之间沸腾传热的基本原理决定的。因此，钢厂应该更加关注冷却设备的设计参数对沸腾现象的影响，而不是简单地增加冷却水流量。在本研究中，当改变了供应冷却水的喷嘴的直径时，已经通过数值研究了其对沸腾传热的影响。根据喷嘴直径研究了平均热通量，莱顿弗罗斯特蒸汽层厚度，温度下降等。

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