电磁场有限元方法在冷坩埚玻璃固化研究中的应用
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- 英文论文题名：Application of electromagnetic field finite element method in the vitrification of cold crucible induction melter
- 论文作者：陈楠 ; 刘丽君 ; 郄东生 ; 周慧
- 英文论文作者：CHEN Nan ; LIU Li-jun ; QIE Dong-sheng ; ZHOU Hui ; China Institude of Atomic Energy
- 年：2015
- 作者机构：中国原子能科学研究院;
- 论文关键词：冷坩埚 ; 玻璃固化 ; 电磁场 ; 有限元方法
- 英文论文关键词：Cold crucible ; Vitrification ; Electromagnetic field ; Finite element method
- 会议召开时间：2015-09-21
- 会议录名称：中国核科学技术进展报告（第四卷）——中国核学会2015年学术年会论文集第6册（核化学与放射化学分卷、核化工分卷）
- 语种：中文
- 分类号：TL941
- 学会代码：EGVD
- 会议名称：中国核学会2015年学术年会
- 会议地点：中国四川绵阳
- 主办单位：中国核学会
- 学会名称：中国核学会
- 页数：7
- 文件大小：816k
- 原文格式：O
- 会议级别：全国
摘要
冷坩埚感应熔炉是目前最新一代的玻璃固化技术,在核废物处理领域具有广阔的应用前景。由于冷坩埚熔炉的基本原理是直接利用高频电磁场对玻璃进行感应加热,因此对冷坩埚熔炉各组件进行合理设计,保证电磁场足够高的加热效率,对玻璃固化过程的顺利进行至关重要。有限元方法是目前国内外求解和分析电磁场问题广泛使用的有力工具,本文简述了电磁场有限元方法的基本原理,总结了国内外电磁场有限元方法在冷坩埚设计和玻璃固化研究中的应用。在冷坩埚设计方面,通过电磁场有限元方法,可以对冷坩埚的电磁场进行数值模拟,分析感应圈、埚体分瓣和开缝、电源参数等设计参数对透磁效果的影响,以提高冷坩埚加热效率。电磁场分析的结果表明,感应线圈截面形状设计为跑道型、埚体开缝设计为楔形,分瓣形状设计为三角形时,冷坩埚内磁通密度最大;并且磁通密度随着开缝数和开缝宽度的增加而提高。电源参数方面,最优加热频率的选择与冷坩埚直径以及被加热物料的电阻率密切相关,可以用冷坩埚直径D与电流透入深度δ的壁纸D/δ来考察频率与负载的匹配情况。有限元分析的结果表明,当D/δ值在4以上时,电效率将达到90%以上;而电源功率对冷坩埚透磁和加热的影响主要通过电流密度体现,冷坩埚内的磁通密度的最大值随电流密度呈线性增加。在玻璃固化工艺过程方面,可将电磁场分析与热场、流场分析耦合,进一步对玻璃固化过程熔体的温度分布、对流情况进行数值模拟。通过模拟玻璃固化的启动、扩熔、搅拌和卸料等工艺过程,可以预测各个工艺阶段下的熔体温度场和流场参数,为冷坩埚玻璃固化装置的建立和运行提供理论依据和参考。
This report gives a brief introduction to electromagnetic field Finite Element Method(FEM) and summarizes the application of FEM in the design and vitrification in the cold crucible melter.Some important design parameters,including induction coil,segments and slits,power parameters,can be calculated and analyzed by FEM.The heating efficiency of cold crucible can be improved accordingly.The electromagnetic analysis can be further coupled with thermal and fluid analysis,which is powerful in prediction of the temperature distribution and convection in the glass melt.The thermal filed and fluid filed parameters in each process of vitrification,including start-up heating,melt-growing,stirring and draining,can be obtained by FEM modeling.This provides theorectical guidance for the building and operation of cold crucible melter for vitrification.
This report gives a brief introduction to electromagnetic field Finite Element Method(FEM) and summarizes the application of FEM in the design and vitrification in the cold crucible melter.Some important design parameters,including induction coil,segments and slits,power parameters,can be calculated and analyzed by FEM.The heating efficiency of cold crucible can be improved accordingly.The electromagnetic analysis can be further coupled with thermal and fluid analysis,which is powerful in prediction of the temperature distribution and convection in the glass melt.The thermal filed and fluid filed parameters in each process of vitrification,including start-up heating,melt-growing,stirring and draining,can be obtained by FEM modeling.This provides theorectical guidance for the building and operation of cold crucible melter for vitrification.
引文
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[15]韩至成,杨院生.电磁冶金技术及装备[M].北京:冶金工业出版社,2008:384-385.
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[19]Jacoutot L,Fautrelle Y,Gagnoud A,et al.Numerical modeling of coupled phenomena in a mechanically stirred molten-glass bath heated by induction[J].Chemical Engineering Science,2008,63(9):2391-2401.
[20]Gopalakrishnan S,Thess A.A simplified mathematical model of glass melt convection in a cold crucible induction melter[J].International Journal of Thermal Sciences,2012,60:142-152.
[2]罗上庚.放射性废物概论[M].北京:原子能出版社,2003:136-140.
[3]胡唐华,冯孝贵,鲍卫民,等.冷坩埚技术在核废物处理处理中的应用[J].核技术,2001,24(6):521-528.
[4]Marra S L,Peeler D K,Strachan D M,et al.High-level waste melter study report[M].Richland,WA:Pacific Northwest National Laboratory,2001.
[5]谢龙汉,耿煜,邱婉.ANSYS电磁场分析[M].北京:电子工业出版社,2012:1-3.
[6]金建铭.电磁场有限元方法[M].西安:西安电子科技大学出版社,1998:1-21.
[7]汪明月.钛铝基合金方形冷坩埚定向凝固工艺研究[D].哈尔滨:哈尔滨工业大学,2007:15-17.
[8]Do Quang R,Jensen A,Prod'homme A,et al.Integrated pilot plant for a large cold crucible induction melter[C].Proceedings of the Waste Management 2002 Symposium WM.2002,2:24-28.
[9]Gombert D,Richardson J R,Roach J A,et al.Cold crucible induction melter prototype at the Idaho national engineering and environmental laboratory[C].Proceedings of the Waste Management 2004 Symposium,Tucson,USA.2004.
[10]G.Sugilal.Experimental study of natural convection in a glass pool inside a cold crucible induction melter[J].International Journal of Thermal Sciences.2008,47(7):918-925.
[11]Chen R,Yang J,Ding H,et al.Effect of power parameter and induction coil on magnetic field in cold crucible during continuous melting and directional solidification[J].China Foundry,2012,9(1):15-19.
[12]Chen R,Yang J,Ding H,et al.Effect of configuration on magnetic field in cold crucible using for continuous melting and directional solidification[J].Transactions of Nonferrous Metals Society of China,2012,(22):404-410.
[13]Westphal E,Muiznieks A,Muhlbauer A.Electromagnetic field distribution in an induction furnace with cold crucible[J].Magnetics,IEEE Transactions on,1996,32(3):1601-1604.
[14]Westphal E,M(u|¨)hlbauer A,Muiznieks A.Berechnung von elektromagnetischen Feldern in zylindrischen Induktionssystemen mit periodisch geschlitzten W(a|¨)nden[J].Electrical Engineering,1996,79(4):251-263.
[15]韩至成,杨院生.电磁冶金技术及装备[M].北京:冶金工业出版社,2008:384-385.
[16]Gross C,Assmus W,Muiznieks A,et al.Power consumption of skull metling,partⅠ:Analytical aspects and experiments,Crystal research and technology[J].1999,34(3):319-328.
[17]Hawkes G.Modeling an RF cold crucible induction heated melter with subsidence,ASME 2004 Heat Transfer/Fluids Engineering Summer Conference[C].American Society of Mechanical Engineers,2004:767-778.
[18]Sauvage E,Burn P,Bonnetier A,et al.3-D thermal,hydrodynamic&magnetic modelling of elaboration of glass by induction in cold crucible[C].Proceedings of the Waste Management 2010 Symposium,Phoenix,USA.2010.
[19]Jacoutot L,Fautrelle Y,Gagnoud A,et al.Numerical modeling of coupled phenomena in a mechanically stirred molten-glass bath heated by induction[J].Chemical Engineering Science,2008,63(9):2391-2401.
[20]Gopalakrishnan S,Thess A.A simplified mathematical model of glass melt convection in a cold crucible induction melter[J].International Journal of Thermal Sciences,2012,60:142-152.