Experimental study on autoignition in a scramjet combustor

Yukinori Sato, Masami Sayama, Goro Masuya, Tomoyuki Komuro, Kenji Kudou, Atsuo Murakami, Kouichiro Tani, Nobuo Chinzei

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


Autoignition characteristics of hydrogen fuel in a scramjet combustor were examined using a direct-connect test apparatus with particular reference to the effect of fuel injection patterns. Autoignition behavior fell into four distinct categories, separated by the three bounding curves. One of the boundaries was independent of fuel injection patterns, while the others significantly depended on them. In the case of fuel injection from a single wall or from a single orifice, local flame quenching caused by expansion wave emanating from the step on the opposite wall was observed. Compared with injection from a single orifice, injection from multiple orifices appreciably enhanced autoignition. The reason for this is that fuel jets from adjacent orifices and from the opposite wall tended to attenuate the local flame quenching caused by the expansion waves from the opposite wall. Ignition limit curves derived from the present experiment were compared with an autoignition criteria proposed by Huber et al. They agree well in the case of fuel injection from a single orifice. For the case of injection from multiple orifices, however, the agreement is poor.

Original languageEnglish
Pages (from-to)657-658
Number of pages2
JournalJournal of Propulsion and Power
Issue number5
Publication statusPublished - 1991 Jan 1

ASJC Scopus subject areas

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


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