Numerical investigation of an RBCC combustor during ramjet/scramjet mode transition

Joseph Salloum, Michael Candon, Andrew Ridings, Hideaki Ogawa, Masatoshi Kodera, Shuichi Ueda

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

1 被引用数 (Scopus)

抄録

Rocket-based Combined-Cycle (RBCC) engines offer a promise for efficient and flexible propulsion over a large Mach number range by combining rocket and ramjet/scramjet technology. To achieve this, an RBCC engine uses four different modes of operation: rocket, ramjet, scramjet and dual-mode. During operation, the engine must make the transition from subsonic to supersonic combustion, i.e., ramjet to scramjet mode. The objective of this study is to gain physical insight into the ramjet-scramjet-ramjet mode transition by elucidating the underlying mechanics. Numerical simulations with chemical reactions have been performed for the transient flowfields of a two-dimensional RBCC combustor by using an unsteady Reynolds-Averaged Navier-Stokes solver. Mode transition is effected by changing the flow rate of the secondary hydrogen fuel injectors installed on the top and bottom walls of the combustor. A parametric study was conducted to investigate the characteristic and behavior of RBCC combustion in mode transition. The results indicated that transition is affected considerably by the presence and development of flow separation and pseudo-shock structures near fuel injectors. The complex effects of aerodynamic and aerothermal interactions on the transient flowfields and performance, along with a hysteresis observed between the scramjet-to-ramjet and ramjet-to-scramjet transition processes.

本文言語英語
ホスト出版物のタイトルAIAA Aerospace Sciences Meeting
出版社American Institute of Aeronautics and Astronautics Inc, AIAA
210059
ISBN(印刷版)9781624105241
DOI
出版ステータス出版済み - 2018
外部発表はい
イベントAIAA Aerospace Sciences Meeting, 2018 - Kissimmee, 米国
継続期間: 1 8 20181 12 2018

出版物シリーズ

名前AIAA Aerospace Sciences Meeting, 2018
番号210059

その他

その他AIAA Aerospace Sciences Meeting, 2018
国/地域米国
CityKissimmee
Period1/8/181/12/18

All Science Journal Classification (ASJC) codes

  • 航空宇宙工学

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