水素予混合乱流火炎の局所燃焼特性に関する実験的検討

DOI

書誌事項

タイトル別名
  • An Experimental Study on Local Propagating Characteristics of Hydrogen Premixed Turbulent Flames

説明

<p>One of the dangers latent in the hydrogen society is that hydrogen has wider flammable range and smaller minimum ignition energy than hydrocarbons. Elucidating the mechanisms of turbulent combustion and establishing a model of turbulent burning velocity for hydrogen mixtures are expected to be developed for prediction and prevention of serious fire or explosion. In our previous studies, the local burning velocity of turbulent flames could be changed from the laminar burning velocity caused by the preferential diffusion effect, and play an important role in the turbulent burning velocity. The present study is performed to investigate directly the local flame properties of hydrogen premixed turbulent flames at the weak turbulence condition. Lean and rich hydrogen mixtures having nearly the same laminar burning velocity are prepared. Propane fueled mixtures are also examined for comparison. A two-dimensional sequential laser tomography technique is used to obtain the temporal statistical relationship between the flame shape and the flame displacement. In order to examine the local burning velocity, the local flame displacement velocity SF is quantitatively obtained as the key parameters of the turbulent combustion. The obtained SF is also discussed by the concept of the Markstein number as well as the preferential diffusion effect.</p>

収録刊行物

キーワード

詳細情報 詳細情報について

  • CRID
    1390010292956881152
  • DOI
    10.50988/hess.31.1_66
  • ISSN
    24365599
    13416995
  • 本文言語コード
    ja
  • データソース種別
    • JaLC
  • 抄録ライセンスフラグ
    使用可

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