Abstract
Flame stability and extinction of a premixed hydrogen-air flame is numerically studied at sub-atmospheric, high altitude flight pressures. A RANS-based model based on an existing model ramjet combustor with a bluff-body at the Propulsion and Energy Research Lab at the University of Central Florida is ran at 3 inlet pressures: 1, .06, and .02 bar. Lean flame blowout is simulated by a transient fuel inlet mass fraction. Local extinction events at the flame front and the transition to lean blowout are studied at sub-atmospheric pressures. The simulations provide an important perspective on the balance of chemical and flow timescales in a lean blowout environment. This study provides new knowledge about flame stability and extinction, allowing for further optimization and development of better combustion systems for high altitude flight.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
