Abstract
This work focuses on forced combustion with regards to the relationship between vent mixer models and several injection locations in unheated supersonic flow. A plasma jet torch was used to ignite the hydrogen-air mixture in a laboratory-scaled combustor duct. The flow field of the combustion was visualized with pressure and gas-sampling measurements. The vent mixers indicate good dispersion characteristics of the mixture for both parallel and normal 1 injections. However, forced combustion is dominantly governed by the injection rate toward the plasma jet (hot source) because the combustible region is restricted under the cold main flow. For this reason, the parallel injection, which provides the hydrogen-air mixture directly toward the plasma jet, shows good combustion performance. The normal 1 injection interacted with the vent mixers and shows slightly good combustion performance. Lastly, the normal 2 injection is little affected by the vent mixers and has poor combustion performance.
Highlights
Hypersonic vehicle concepts for high-altitude passenger planes or space launchers have been designed based on dual-mode scramjet engines or rocket-based combined cycle (RBCC) engines [1,2]
This work was carried out to study the performance of vent mixer models in a laboratory-scaled
This work was facility, carried with out forced to study the by performance vent mixer models supersonic combustor ignition a plasma jet of torch performed with the in colda laboratory-scaled supersonic combustor facility, with forced ignition by a plasma jet torch main flow
Summary
Hypersonic vehicle concepts for high-altitude passenger planes or space launchers have been designed based on dual-mode scramjet engines or rocket-based combined cycle (RBCC) engines [1,2]. These hypersonic vehicles are initially accelerated by the rocket booster to obtain the sufficient inflow air speed required for start-up of the scramjet engines. When the flight Mach number goes beyond 5, the combustion mode changes to the supersonic combustion (or scramjet) mode Under this transition mode, the isolator is generally used to prevent the shock train from affecting the intake of the vehicle [3]
Sign-in/Register to view highlights & summary 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.
