Studies on the flame curvature effect on burning velocity

Takeshi Yokomori, Zheng Chen, Yiguang Ju

研究成果: Conference contribution

抄録

The curvature effect on the burning velocity of highly curved flames has been investigated numerically and theoretically. The cylindrical flame was used and compared with the counterflow flame to extract the curvature effect. The numerical simulation with detailed chemistry for hydrogen/air, methane/air, and propane/air flames showed that the burning velocity was significantly affected by the flame curvature in addition to the flame stretch. This curvature effect increased the burning velocity for mixtures with Le < 1, but decreased the burning velocity for mixtures with Le > 1, and only had little effect for mixtures with Le ∼ 1. In the conventional burning velocity relation derived from the assumptions of small flame curvature and thin flame thickness, this curvature effect has not included. Therefore, the asymptotic analysis without such assumptions was performed to further investigate this additional curvature effect. The analytical results also showed the flame curvature effect and qualitatively agreed with the numerical simulations. This agreement implies that the conventional burning velocity relation missed this additional curvature effect and that this curvature effect was caused by the thermal-diffusive transport dependence on the sub-coordinate location in the flame zone.

本文言語English
ホスト出版物のタイトルCollection of Technical Papers - 44th AIAA Aerospace Sciences Meeting
出版社American Institute of Aeronautics and Astronautics Inc.
ページ1947-1952
ページ数6
ISBN(印刷版)1563478072, 9781563478079
DOI
出版ステータスPublished - 2006
外部発表はい
イベント44th AIAA Aerospace Sciences Meeting 2006 - Reno, NV, United States
継続期間: 2006 1 92006 1 12

出版物シリーズ

名前Collection of Technical Papers - 44th AIAA Aerospace Sciences Meeting
3

Other

Other44th AIAA Aerospace Sciences Meeting 2006
CountryUnited States
CityReno, NV
Period06/1/906/1/12

ASJC Scopus subject areas

  • Space and Planetary Science
  • Aerospace Engineering

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