Numerical simulations of electromagnetic behavior and AC loss in rectangular bulk superconductor with an elliptical flaw under AC magnetic fields

doi:10.1016/j.cryogenics.2015.02.003

	Numerical simulations of electromagnetic behavior and AC loss in rectangular bulk superconductor with an elliptical flaw under AC magnetic fields
	Xia, J; Zhou, YH; Zhou, YH (reprint author), Lanzhou Univ, Minist Educ China, Key Lab Mech Disaster & Environm Western China, Lanzhou 730000, Gansu, Peoples R China.
刊名	CRYOGENICS
	2015-07
卷号	69 页码:1-9
关键词	Strong local enhancement of the current density AC loss Defect High-temperature superconductor
ISSN号	0011-2275
DOI	10.1016/j.cryogenics.2015.02.003
文献子类	Article
英文摘要	This paper presents a finite element model based on the H-formulation to solve the electromagnetic behavior and AC loss in rectangular bulk superconductor with an elliptical flaw in AC external field condition. Both the interior flaw and the edge flaw are considered. A modified E-J power law which is valid for an arbitrary current density range is adopted in order to predict the strong local enhancement of the current density in the vicinity of the flaw tip. The results for the usual E-J power law are calculated for comparison as well. The simulation results show that the existence of the flaw significantly blocks the flow of the induced current and forces the current to redistribute around it. Meanwhile, the strong local enhancement of the current density is observed in the vicinity of the flaw tip. Furthermore, the influences of the size and position of the flaw on the local enhancement of the current density in the vicinity of the flaw tip are investigated. In addition, it is found that the influence of the flaw on the AC loss of the sample is slight for both cases of the interior flaw and the edge flaw. (C) 2015 Elsevier Ltd. All rights reserved.
学科主题	Thermodynamics ; Physics
出版地	OXFORD
资助项目	国家自然科学基金项目 ; 国家磁约束核聚变能发展研究专项 ; 中央高校基本科研业务费专项资金
项目编号	Natural Science Foundation of China [11032006, 11121202] ; National Key Project of Magneto-Constrained Fusion Energy Development Program [2013GB110002] ; Fundamental Research Funds for the Central Universities [lzujbky-2014-k10]
语种	英语
WOS记录号	WOS:000356986400001
资助机构	NSFC ; MOST ; LZU
内容类型	期刊论文
源URL	[http://ir.lzu.edu.cn/handle/262010/182439]
专题	土木工程与力学学院_期刊论文
通讯作者	Zhou, YH (reprint author), Lanzhou Univ, Minist Educ China, Key Lab Mech Disaster & Environm Western China, Lanzhou 730000, Gansu, Peoples R China.
推荐引用方式 GB/T 7714	Xia, J,Zhou, YH,Zhou, YH . Numerical simulations of electromagnetic behavior and AC loss in rectangular bulk superconductor with an elliptical flaw under AC magnetic fields[J]. CRYOGENICS,2015,69:1-9.
APA	Xia, J,Zhou, YH,&Zhou, YH .(2015).Numerical simulations of electromagnetic behavior and AC loss in rectangular bulk superconductor with an elliptical flaw under AC magnetic fields.CRYOGENICS,69,1-9.
MLA	Xia, J,et al."Numerical simulations of electromagnetic behavior and AC loss in rectangular bulk superconductor with an elliptical flaw under AC magnetic fields".CRYOGENICS 69(2015):1-9.