在高温超导线圈中火保护过程中的机械反应的数值研究
Ruoshan Jiao1,2, Mingzhi Guan1,2,3
1Advanced Energy Science and Technology Guangdong Laboratory, Huizhou 516000, China.
Materials (Basel, Switzerland)
|June 28, 2023
概括
这项研究在火过程中模拟了稀土铜氧化物 (REBCO) 高温超导 (HTS) 线圈. 有限元模型揭示了系统倾倒时间和磁场如何影响线圈应力和温度,为火保护提供了洞察力.
科学领域:
- 超导电性 超导电性 超导电性
- 材料科学 材料科学 材料科学
- 电磁主义 电磁主义
- 机械工程 机械工程
背景情况:
- 高温超导 (HTS) 线圈,特别是使用稀土铜氧化物 (REBCO) 的线圈,对于先进技术至关重要.
- 了解它们在灭事件中的行为对于确保操作安全和可靠性至关重要.
- 火涉及到超导的突然损失,导致温度快速上升和机械应力.
研究的目的:
- 为了研究REBCO HTS绝缘饼线圈在火过程中的机械反应和电热特性.
- 分析各种参数对火行为的影响,包括系统倾倒时间,背景磁场,材料特性和线圈尺寸.
- 确定有效的策略,以减轻火保护期间的峰值应力和应变.
主要方法:
- 开发一个具有真实维度的二维轴对称电磁热机械有限元模型 (FEM) 模型.
- 系统模拟火场景通过不同的参数,如系统倾倒触发时间,背景磁场强度,绝缘电导率,铜厚度和内线圈半径等.
- 在火过程中,对REBCO饼线圈内的温度,电流,应力和应变的变化进行分析.
主要成果:
- 增加系统倾倒触发时间会提高高峰热点温度,但不会影响消散速度.
- 在火开始时,辐射应变速率发生明显的变化,不管背景磁场如何.
- 辐射应力和应变在火保护期间达到峰值,随后随温度而降低;轴向磁场显著影响辐射应力.
结论:
- 优化绝缘电导率,铜厚度和内线圈半径可以有效地减少峰值辐射应力和应变.
- 该研究为REBCO HTS线圈设计强大的火保护系统提供了关键数据.
- FEM分析是预测和管理超导线圈复杂的电热机械行为的强大工具.
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