Hazard evaluation of hydrogen-air deflagration with flame propagation velocity measurement by image velocimetry using brightness subtraction

Teruhito Otsuka, Hiroyasu Saitoh, Takaaki Mizutani, Kaoru Morimoto, Norihiko Yoshikawa

研究成果: Article

25 引用 (Scopus)

抜粋

Deflagration phenomena in hydrogen-air mixtures initially filled in 1.4 m3 spherical latex balloons were measured using a high-speed digital video camera and pressure transducers. The image velocimetry using brightness subtraction was introduced to eliminate the background effects for obtaining accurate time evolution records of flame propagation velocity. The maximum flame propagation velocity of about 100 m/s was observed with maximum overpressure 15 kPa at 1 m from ignition point. According to the detailed flame propagation velocity records, there were long deceleration durations. The observed maximum overpressure was smaller than the overpressure estimated by the basis of the observed maximum flame propagation velocity and the pressure wave theories of spherical flames. A new blast curve plot of scaled overpressure vs. distance was tentatively proposed.

元の言語English
ページ(範囲)427-432
ページ数6
ジャーナルJournal of Loss Prevention in the Process Industries
20
発行部数4-6
DOI
出版物ステータスPublished - 2007 7 1
外部発表Yes

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Food Science
  • Chemical Engineering(all)
  • Safety, Risk, Reliability and Quality
  • Energy Engineering and Power Technology
  • Management Science and Operations Research
  • Industrial and Manufacturing Engineering

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