Numerical study of the effect of obstacles on the spontaneous ignition of high-pressure hydrogen

Youhi Morii, Hiroshi Terashima, Mitsuo Koshi, Taro Shimizu

研究成果: Article査読

26 被引用数 (Scopus)

抄録

A numerical simulation of the spontaneous ignition of high-pressure hydrogen in a duct with two obstacles on the walls is conducted to explore the spontaneous ignition mechanisms. Two-dimensional rectangular ducts are adopted, and the Navier-Stokes equations with a detailed chemical kinetic mechanism are solved by using direct numerical simulations. In this study, we focus on the effects of the initial pressure of hydrogen and the position of the obstacles on the ignition mechanisms. Our results demonstrate that the presence of obstacles significantly changes the spontaneous ignition mechanisms producing three distinct ignition mechanisms. In addition, the position of the obstacles drastically changes the interaction of shock waves with the contact surface, and spontaneous ignition may take place at a relatively low pressure in some obstacle positions, which is attributed to the propagation direction and interaction timing of two reflected shock waves.

本文言語English
ページ(範囲)92-99
ページ数8
ジャーナルJournal of Loss Prevention in the Process Industries
34
DOI
出版ステータスPublished - 2015 3月 1
外部発表はい

ASJC Scopus subject areas

  • 制御およびシステム工学
  • 食品科学
  • 化学工学(全般)
  • 安全性、リスク、信頼性、品質管理
  • エネルギー工学および電力技術
  • 経営科学およびオペレーションズ リサーチ
  • 産業および生産工学

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