Performance of a RBCC combustor operating in ramjet mode

Toshinori Kouchi, Kan Kobayashi, Kenji Kudo, Atsuo Murakami, Kanenori Kato, Sadatake Tomioka

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Citations (Scopus)


The direct-connect combustion tests and the numerical simulations of the rocket-ramjet combined cycle combustor, requiring large bases to install rocket chambers, were conducted to determine whether the combustor could be operated in ramjet mode. The rocket engines in the combustor were operated at fuel rich condition as fuel injectors for the freestream. For the rocket operation alone, the combustor was operated in scramjet mode. By the secondary fuel injection from the cowl, the supersonic freestream was decelerated to subsonic speed by the combustion-generated shock train in front of the secondary injection. The subsonic combustion of the secondary injected fuel resulted in higher combustion and thrust performances. The further upstream secondary injection was suitable for the ramjet operation. By the increase in fuel flow rate of the secondary injection, the thermal load on both the rocket chamber and throat was reduced without decrease in thrust. Gas sampling measurements at the exit of the combustor revealed that the merger of the secondary fuel with the rocket plumes resulted in the decrease of the combustion and thrust performances.

Original languageEnglish
Title of host publicationCollection of Technical Papers - AIAA/ASME/SAE/ASEE 42nd Joint Propulsion Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
Number of pages14
ISBN (Print)1563478188, 9781563478185
Publication statusPublished - 2006
Externally publishedYes
EventAIAA/ASME/SAE/ASEE 42nd Joint Propulsion Conference - Sacramento, CA, United States
Duration: Jul 9 2006Jul 12 2006

Publication series

NameCollection of Technical Papers - AIAA/ASME/SAE/ASEE 42nd Joint Propulsion Conference


OtherAIAA/ASME/SAE/ASEE 42nd Joint Propulsion Conference
Country/TerritoryUnited States
CitySacramento, CA

ASJC Scopus subject areas

  • Space and Planetary Science
  • General Energy
  • Aerospace Engineering
  • Control and Systems Engineering
  • Electrical and Electronic Engineering
  • Mechanical Engineering


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