摘要
介绍了中厚板控制冷却过程中所用的数学模型,包括差分模型、空冷和水冷换热系数模型、比热和热传导率模型,并采用有限差分法模拟计算了钢板在冷却过程中厚度、宽度方向上的温度场分布,以及间歇冷却对控制冷却的影响·从模拟结果可以看出,返红时间、厚度上温度梯度随钢板厚度增加而增加;间歇冷却时钢板内部温度呈均匀下降,表面不断冷却与返红过程·在线应用证明该套数学模型计算精度较高,可以满足现场实际生产的要求·
The model showed by the topic was introduced including a difference expression and some models for heat transfer coefficient air/water cooling specific heat and heat conductivity. Applying the finite difference method to the simulation of cooling process, the temperature field along the thickness/width of plate was calculated, as well as the effect of intermittent cooling on the result of cooling control. Simulating results showed that the re-reddening time and temperature gradient along thickness increase with plate thickness and the inner temperature of plate decrease evenly if cooling intermittently,with plate surface continuously cooled and re-reddended. The on-line applications revealed that the model can get high accuracy in calculation to meet actual requirements in production.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2003年第10期923-926,共4页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金资助项目(59995440)
教育部高等学校博士学科专项科研基金资助项目(97014515).
关键词
控制冷却
数学模型
中厚板
温度场
间歇冷却
cooling control
mathematical model
medium plate
temperature field
intermittent cooling
