水冷换热系数的研究及平面凝固铸造的数值模拟

doi:10.12068/j.issn.1005-3026.2017.10.010

东北大学学报:自然科学版 ›› 2017, Vol. 38 ›› Issue (10): 1416-1420.DOI: 10.12068/j.issn.1005-3026.2017.10.010

水冷换热系数的研究及平面凝固铸造的数值模拟

邵博，秦克，张海涛，崔建忠

(东北大学材料电磁过程研究教育部重点实验室，辽宁沈阳110819)

收稿日期:2016-11-14 修回日期:2016-11-14 出版日期:2017-10-15 发布日期:2017-10-13
通讯作者: 邵博
作者简介:邵博(1990－)，男，安徽淮北人，东北大学博士研究生; 崔建忠(1950-)，男，黑龙江双城人，东北大学教授，博士生导师.
基金资助:
教育部高等学校博士学科点专项科研基金资助项目(2012CB723307)；辽宁省自然科学基金资助项目(2014020031).

Study on Heat Transfer Coefficient and Numerical Simulation of Planar Solidification Casting

SHAO Bo， QIN Ke， ZHANG Hai-tao， CUI Jian-zhong

Key Laboratory of Electromagnetic Processing of Materials， Ministry of Education， Northeastern University， Shenyang 110819， China.

Received:2016-11-14 Revised:2016-11-14 Online:2017-10-15 Published:2017-10-13
Contact: ZHANG Hai-tao
About author:-
Supported by:
-

摘要/Abstract

摘要： 分别建立了喷雾冷却和平面凝固铸造的二维计算模型.根据对1070铝合金方锭末端冷却所测得的温度数据，反求出不同水压下冷却面表面温度与换热系数的变化规律，并将其作为边界条件导入平面凝固铸造的计算模型进行可靠性验证.结果表明:界面换热系数随冷却面温度的降低先升高后降低，在400K左右达到峰值.随着冷却水压的增加，换热系数的峰值和峰值对应的温度值也相应增大.铸造实验测温结果表明:所用平面凝固装置可实现凝固前沿宏观上呈平面上升，且凝固过程中铸锭各处冷却均匀;与数学模型计算结果吻合良好，说明该模型可用于平面凝固铸造工艺方案的研究.

关键词: 换热系数, 喷雾冷却, 平面凝固, 数值模拟, 凝固前沿

Abstract: 2D mathematical models of spray cooling and planar solidification casting were established. Using the temperature data measuring from 1070 aluminum alloy ingot， the relationships between the cooling surface temperature and heat transfer coefficient (HTC) under different cooling water pressures was derived reversely， which was used to verify the model of planar solidification casting. The results showed that the HTC firstly increases and then decreases with the decrease of the cooling surface temperature， and reaches the peak at about 400K. The HTC peak value and its corresponding temperature increase with the cooling water pressure. The casting experiment results showed that the solidification front is macroscopically planar and the cooling rate of the ingot is uniformly distributed during the solidification. The simulation results well agree with the experimental results， which prove the capability of the model of planar solidification casting.

Key words: heat transfer coefficient, spray cooling, planar solidification, numerical simulation, solidification front

中图分类号:

TG292
TB115

邵博，秦克，张海涛，崔建忠. 水冷换热系数的研究及平面凝固铸造的数值模拟[J]. 东北大学学报:自然科学版, 2017, 38(10): 1416-1420.

SHAO Bo， QIN Ke， ZHANG Hai-tao， CUI Jian-zhong. Study on Heat Transfer Coefficient and Numerical Simulation of Planar Solidification Casting[J]. Journal of Northeastern University Natural Science, 2017, 38(10): 1416-1420.

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水冷换热系数的研究及平面凝固铸造的数值模拟

Study on Heat Transfer Coefficient and Numerical Simulation of Planar Solidification Casting

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