Effects of injector geometry on scramjet combustor performance

Nobuo Chinzei, Tomoyuki Komuro, Kenji Kudou, Atsuo Murakami, Kouichiro Tani, Goro Masuya, Yoshio Wakamatsu

研究成果: Article

42 引用 (Scopus)

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An experiment was conducted to investigate the effect of injector/combustor geometry on combustion-induced peak wall pressure and associated upstream influence, as well as on mixing/combustion characteristics at an entrance Mach number of 2.5. The length of the constant area section downstream of injection orifices had a strong influence on the above-mentioned characteristics. However, the sweep of the rearward-facing steps on both side walls had little effect on these characteristics, nor did reversing them have any effect. The peak wall pressure and the length of the upstream influence agreed qualitatively with predictions of an analytical model and an empirical formula developed at Johns Hopkins University. Fuel jets injected from the model with the longest constant area section and the fuel equivalence ratio of unity, coalesced at a very early stage downstream of the fuel injection orifices. This coalescence led to a decrease in mixing rate downstream, despite the higher degree of mixing near the injection orifices. The combustion efficiencies were higher than those obtained at NASA Langley in the upstream region due to the higher mixing rate near the injection orifices.

元の言語English
ページ(範囲)146-152
ページ数7
ジャーナルJournal of Propulsion and Power
9
発行部数1
DOI
出版物ステータスPublished - 1993 1 1

ASJC Scopus subject areas

  • Aerospace Engineering
  • Fuel Technology
  • Mechanical Engineering
  • Space and Planetary Science

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  • これを引用

    Chinzei, N., Komuro, T., Kudou, K., Murakami, A., Tani, K., Masuya, G., & Wakamatsu, Y. (1993). Effects of injector geometry on scramjet combustor performance. Journal of Propulsion and Power, 9(1), 146-152. https://doi.org/10.2514/3.11497