Study on the "Steadiness" of Flame Spreading of Electric Wires : Verification of Dominant Factor for Melting and Gasification Processes during Cable Fires

电线火焰蔓延的“稳定性”研究：电缆火灾熔化和气化过程主导因素的验证

• 批准号: 21681022
• 负责人: NAKAMURA Yuji
• 金额: $ 16.56万
• 依托单位: Hokkaido University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (A)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21681022/
• 关键词: 電気火災; 火炎燃え拡がり; 溶融ポリマー; 燃え拡がり速度; 低圧火災; 理論解析

Steadiness of flame spread over electric wire has been studied experimentally as well as numerically(theoretically). With precise visualization and temperature measurement of wire during the flame spreading event, it is understood what is the mechanism to lead the unsteadiness and what is the condition to reach steadiness of the system. To verify this consideration, Pe-. correlation has been proposed and the verification is fulfilled. Applicability of B-number theory to describe wire combustion character was ensured via microflame study. Direct numerical simulation methodology was developed based on VOF method and enthalpy-porosity method and the precise prediction of growing event of heated molten polymer was successfully accomplished.

火焰的稳定性散布在电线上，并在数值（理论上）进行了研究。通过在火焰扩散事件期间的精确可视化和温度测量，可以理解导致不稳定的机制是什么，以及达到系统稳定的条件是什么。要验证此考虑，请。已经提出了相关性，并实现了验证。 B-Number理论在描述电线燃烧特征的适用性是通过缩影研究确保的。直接数值模拟方法是基于VOF方法和焓孔隙率法开发的，并且成功完成了加热熔融聚合物增长事件的精确预测。

项目成果

Heat Transfer and Dynamic Motion of Phase Change Material in Melting and Dropping Process

相变材料熔化滴落过程中的传热与动态运动

• 发表时间: 2012
• 作者: Kim;YK.
• 通讯作者: YK.

Effect of Wire Scales on Spread Behavior in Sub-atmospheric Pressure

金属丝鳞片对负压下扩散行为的影响

• 发表时间: 2009
• 作者: Kegel A;Betts-Lindroos H;Kanno T;Jeppsson K;Strom L;Katou Y;Itoh T;Shirahige K;Sjogren C;中村祐二
• 通讯作者: 中村祐二

Time-dependent Flame Spread Behaviour of Electric Wire in Sub-atmospheric Pressure

低于大气压下电线随时间变化的火焰传播行为

• 发表时间: 2009
• 作者: 今井礼夢;和多和宏;M. Kita;H. Mamiya and B. Jeyadevan;中村祐二
• 通讯作者: 中村祐二

COMSOLカンファレンス2010東京,招待講演(2010. 12)"Numerical Simulation of Liquefying Process of Solid PCM by using COMSOL Multiphysics"講演依頼

COMSOL Conference 2010 东京，特邀报告 (2010. 12) “Numerical Simulation of Liquefying Process of Solid PCM by using COMSOL Multiphysics”

低圧雰囲気中での単線ケーブル燃焼挙動における非定常性

低压气氛下单丝电缆燃烧行为的不稳定

• 发表时间: 2009
• 作者: H.Mamiya;et al.;中村祐二
• 通讯作者: 中村祐二