钢板超快速冷却条件下换热实验研究

发布时间：2018-04-28 23:22

  本文选题：超快速冷却 + 汽雾冷却　； 参考：《东北大学学报(自然科学版)》2017年10期

【摘要】：采用汽雾射流冷却方式,在射流角为0°~60°时,研究了10 mm厚不锈钢板轧后超快速冷却过程中表面射流流动结构、换热区分布和钢板温降规律,分析了倾斜射流对钢板表面热流密度和冷速的影响.结果表明:射流角通过改变钢板表面滞止区和横向流区面积、水流密度、介质流动形态和流动速度,影响钢板表面换热形式和热流密度分布,进而影响超快速冷却冷速;射流角为30°时钢板平均冷速和临界热流密度均达到最大值,分别为146.5℃/s和2.75 MW/m~2.
[Abstract]:In this paper, the surface jet flow structure, heat transfer zone distribution and temperature drop of 10 mm thick stainless steel plate during ultra-fast cooling process were studied when the jet angle was 0 掳~ 60 掳. The effect of inclined jet on heat flux and cooling rate on steel plate surface is analyzed. The results show that the jet angle affects the heat transfer and heat flux distribution of the steel plate surface by changing the area of the lag zone and the transverse flow zone, the density of the water flow, the shape of the medium flow and the velocity of the flow on the surface of the steel plate, and then affects the cooling rate of ultra-fast cooling. When the jet angle is 30 掳, the average cooling rate and critical heat flux of the steel plate reach the maximum value, which are 146.5 鈩，

本文编号：1817366