Influence of turbulence modeling on combustor flowfield in scramjet mode of rbcc engine

Joseph Salloum, Michael Candon, Hideaki Ogawa, Masatoshi Kodera

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

Abstract

Rocket-based Combined-Cycle (RBCC) engines offer promise for efficient and flexible propulsion for space transportation over a wide Mach number range by combining rocket and airbreathing propulsion technologies. To achieve this an RBCC engine uses four different modes of operation, i.e., ejector, ramjet, scramjet and rocket modes, during the ascent phase. The engine must thus make effective transition from subsonic to supersonic combustion, i.e., ramjet to scramjet mode during operation. The study is conducted to investigate the effects of turbulence modeling on the simulation of the RBCC combustor flowfield and the prediction of the combustor performance in the scramjet mode. A two-dimensional RBCC configuration has been considered numerically, using hydrogen as the fuel supplied through injectors at the divergent top wall and horizontal floor. Combustion has been found to occur predominantly near the top injector and along the shear layer downstream, with its extent being considerably sensitive to the choice of turbulent Schmidt number and turbulence model. The performance of the combustor crucially depends on these attributes subsequently due to complex flow phenomena and interactions as well as counteracting behavior of pressure and viscous forces.

Original languageEnglish
Title of host publication23rd AIAA International Space Planes and Hypersonic Systems and Technologies Conference, 2020
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624106002
Publication statusPublished - 2020
Event23rd AIAA International Space Planes and Hypersonic Systems and Technologies Conference, 2020 - Montreal, Canada
Duration: Mar 10 2020Mar 12 2020

Publication series

Name23rd AIAA International Space Planes and Hypersonic Systems and Technologies Conference, 2020

Conference

Conference23rd AIAA International Space Planes and Hypersonic Systems and Technologies Conference, 2020
CountryCanada
CityMontreal
Period3/10/203/12/20

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Space and Planetary Science
  • Control and Systems Engineering

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  • Cite this

    Salloum, J., Candon, M., Ogawa, H., & Kodera, M. (2020). Influence of turbulence modeling on combustor flowfield in scramjet mode of rbcc engine. In 23rd AIAA International Space Planes and Hypersonic Systems and Technologies Conference, 2020 (23rd AIAA International Space Planes and Hypersonic Systems and Technologies Conference, 2020). American Institute of Aeronautics and Astronautics Inc, AIAA.