Stability Analysis of Forced-Flow Cooled Superconductor

强制流动冷却超导体的稳定性分析

• 批准号: 03650185
• 负责人: ITO Takehiro
• 金额: $ 1.34万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03650185/
• 关键词: Superconductor; Supercritical Helium; Stability Analysis; Forced Flow; Cryogenics; 超伝導マグネット; 低温; 数値シミュレ-ション

A numerical analysis of the thermal stability of a superconductor composite cooled by forced-flow supercritical helium has been conducted and the influence of several parameters on the thermal stability examined. The results are summarized as follows. 1.When quenching occurs, the helium pressure rises rapidly and the normal zone propagates towards the up- and downstream directions. 2.The stability limit increases with an increase in the initial flow velocity and the diameter of the coolant passage, and with a decrease in the helium temperature and the transport current. 3.When transport current is small, the effect of initial flow velocity is remarkable on stability limit. 4.In the condition of large transport current, transient heat transfer has much larger effect than initial flow velocity. 5.The larger transport current is, the larger the effect of initial helium temperature is on stability limit. 6.The larger the coolant passage is, the less the effect of helium flow velocity is on stability limit. 7.The conductor stability does not depend on the initial pressure covered in the present analysis (0.3-0.8[MPa]). 8.The effect of initial transient heat transfer is very large, it is decided mostly within some 10 [ms] after heat disturbance whether superconductor quenches or not.

已经对通过强制流超临界氦气冷却的超导体复合材料的热稳定性进行了数值分析，并且几个参数对所检查的热稳定性的影响。结果总结如下。 1.当发生淬火时，氦压力迅速上升，正常区域向上和下游方向传播。 2.稳定性极限随着初始流速度和冷却液通过的直径的增加而增加，并且氦温度和传输电流的降低。 3.当运输电流很小时，初始流速速度的影响在稳定性极限上显着。 4.在较大的传输电流状态下，瞬态传热的效果比初始流速度大得多。 5.越大的运输电流是，初始氦气温度的影响越大，对稳定性极限。 6.冷却液通过的越大，氦流速度的影响越小。 7.导体稳定性不取决于本分析中涵盖的初始压力（0.3-0.8 [MPA]）。 8.初始瞬态传热的影响非常大，在热干扰后大约10 [ms]中，无论是否超导猝灭，它都决定在大约10 [ms之内。

项目成果

T.Ito: "Stability Analysis of Forced-Flow Cooled Superconductor" 2nd US-Japan Joint Seminar on Basic Mechanism of Helium Heat Transfer and Related Influence on Stability of Superconducting Magnets. 1B-1. (1991)

T.Ito：“强制流冷却超导体的稳定性分析”第二届美日氦传热基本机制及对超导磁体稳定性的影响联合研讨会。

T.Ito: "Stability Analysis of Forced-Flow Cooled Superconductor" 2nd US-Japan Joint Seminar on Basic Mechanisms of Helium Heat Transfer and Related Influence on Stability of Super-conducting Magnets. 1B-1 (1991)

T.Ito：“强制流动冷却超导体的稳定性分析”第二届美日氦传热基本机制及对超导磁体稳定性的影响联合研讨会。

T.Ito: "Stability analysis of a forced-flow superconductor" Cryogenics. Vol.32,No.5. 439-444 (1992)

T.Ito：“强制流动超导体的稳定性分析”Cryogenics。

T.Ito: "Stability analysis of a forced-flow superconductor" Cryogenics. 32. 436-444 (1992)

T.Ito：“强制流动超导体的稳定性分析”Cryogenics。

T.Ito: "Stability Analysis of Forced-Flow Cooled Superconductor" 2nd US-Japan Joint Seminar on Basic Mechanisms of Helium Heat Transfer and Related Influence on Stability of Superconducting Magnets. 1B-1 (1991)

T.Ito：“强制流动冷却超导体的稳定性分析”第二届美日联合研讨会，氦传热基本机制及相关对超导磁体稳定性的影响。