論文

査読有り
2020年

Flame spread over polyethylene-insulated copper and stainless-steel wires at high pressure

Fire Safety Journal
  • Kobayashi, Y.
  • ,
  • Nakaya, S.
  • ,
  • Tsue, M.
  • ,
  • Takahashi, S.

120
記述言語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.firesaf.2020.103062

© 2020 Elsevier Ltd This work studied flame spread over polyethylene (PE)-insulated wires at high pressure with an emphasis on the effect of ambient pressure. Laboratory simulated wires were used as a tested wire, which consisted of semi-transparent low-density PE (LDPE) tube as an insulation and copper (Cu) rod or stainless-steel (SS) tube as a core. Increasing ambient pressure produced much soot, leading to an intensively yellow luminous flame. Flame spread rate for Cu rod increased with ambient pressure, whereas that for SS tube decreased. A qualitative analysis via a simplified flame spread model shows that the flame heat flux increases with ambient pressure, but consequently the flame heating decreases due to the decreased flame heating length. Therefore, the flame spread rate for SS tube decreased with increasing ambient pressure. For Cu rod, however, the core heating is dominant enough to compensate the decreased flame heating, and thus the ambient pressure positively affected the flame spread. During the flame spread, melted insulations were often dripped down, but it reduced with increasing ambient pressure. For Cu rod, no dripping occurred when further increasing ambient pressure, which indicates that there is the dripping limit at a high-pressure region. These findings should contribute to electrical fire safety in elevated pressure environments.

リンク情報
DOI
https://doi.org/10.1016/j.firesaf.2020.103062
URL
http://www.scopus.com/inward/record.url?eid=2-s2.0-85091250912&partnerID=MN8TOARS
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85091250912&origin=inward
ID情報
  • DOI : 10.1016/j.firesaf.2020.103062
  • ISSN : 0379-7112
  • ORCIDのPut Code : 82022660
  • SCOPUS ID : 85091250912

エクスポート
BibTeX RIS