Deflagration phenomena in a constant volume vessel under elevated gravity

Hiroyasu Saitoh, Kentaro Makita, Takaaki Mizutani, Tomohito Hori

研究成果: Conference contribution

抄録

In order to clarify the effects of gravity on deflagration phenomena, we conducted flammable gas explosion experiments using a constant volume combustion vessel under several gravity level from earth gravity (1 G) to elevated gravity up to 50 G. The elevated gravity field was formed by a centrifuge. We observed the expanding flames in hydrogen-air, methane-air, and propane-air mixtures by a high-speed camera and measured explosion pressures in the vessel. Lean and rich flammablility limits were determined by the records of the explosion pressures, and it was confirmed that the flammable range were approximately same regardless of the gravity level. In the methane-air and propane-air conditions, the shapes of the propagating flames changed dramatically with increase of gravity due to strong buoyancy effect, especially in lean and rich flame conditions with slow burning velocity. Also, with increase of gravity, maximum overpressure and maximum rate of pressuer rise decreased except the case of hydrogen-air flame with higher burning velocity.

本文言語English
ホスト出版物のタイトル47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2011
出版社American Institute of Aeronautics and Astronautics Inc.
ISBN(印刷版)9781600869495
DOI
出版ステータスPublished - 2011
イベント47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2011 - San Diego, CA, United States
継続期間: 2011 7 312011 8 3

出版物シリーズ

名前47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2011

Conference

Conference47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2011
国/地域United States
CitySan Diego, CA
Period11/7/3111/8/3

ASJC Scopus subject areas

  • エネルギー工学および電力技術
  • 航空宇宙工学
  • 制御およびシステム工学
  • 電子工学および電気工学
  • 機械工学

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