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Investigation on the Self-ignition of High-pressure Hydrogen in a Tube between Different Inner Diameter

튜브 직경에 따른 고압 수소의 자발 점화 현상에 대한 연구

  • Kim, Sei Hwan (Daewoo Shipbuilding & Marine Engineering Co., Ltd.) ;
  • Jeung, In-Seuck (Department of aerospace engineering, Seoul National University) ;
  • Lee, Hyoung Jin (Department of aerospace engineering, Inha University)
  • 김세환 ((주)대우조선해양) ;
  • 정인석 (서울대학교 기계항공공학부) ;
  • 이형진 (인하대학교 항공우주공학과)
  • Received : 2018.01.26
  • Accepted : 2018.03.05
  • Published : 2018.03.30

Abstract

Numerical simulations and experiments are performed to investigate the flame development inside tubes with different diameters at the same burst pressure. It is shown that generation of a stable flame play a role in self-ignition. In the smaller tube, multi-dimensional shock interaction is occurred near the diaphragm. After flame of a cross-section is developed, stable flame remains for a moment then it grows having enough energy to overcome the sudden release at the exit. Whereas shock interaction generate complex flow further downstream for a larger tube, it results in stretched flame. This dispersed flame has lower average temperature which makes it easily extinguished.

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