Ignition characteristics for transient plasma ignition of ethylene/air and JP-10/air mixtures in a Pulse Detonation Engine
Hackard, Charles N.
Brophy, Christopher M.
MetadataShow full item record
The inlet mass flow, fuel injection profile, igniter characteristics, ignition delay, and operational frequency all dictate the success of a Pulse Detonation Engine (PDE). An optical sensor was developed and utilized for the observation of ignition zone characteristics over varying refresh conditions that showed decreasing ignition delay times when approaching marginally fuelrich reactant mixtures. A wide range of equivalence ratios for ethylene/air mixtures were explored and a limited number of JP-10/air mixtures. The JP-10/air fuel mixtures were nearly impossible to ignite at characteristic velocities greater than 35 m/s until a porous ignition shield was installed. The porous shield, surrounding the Transient Plasma Ignition (TPI) electrode, demonstrated the successful ignition at characteristic velocities up to 100 m/s for C2H4/air and 55 m/s for JP-10/air mixtures. The ignition shield slowed down a portion of the fuel-air mixture to increase the local residence time, allowing for more reliable ignition. The resulting combustion products proceeded to ignite the remaining fuel-air mixture. The ignition shield design appears to locally prevent a complete purge of the previous cycle's products, and a transient plasma discharge was still required for subsequent ignition to occur. This effect further reduced the observed ignition delay time in ethylene/air and JP-10/air fuel mixtures.
Showing items related by title, author, creator and subject.
Sinibaldi, Jose O.; Rodriguez, Joel; Channel, Brent; Brophy, Chris; Wang, Fei; Cathey, Charles; Gundersen, Martin A. (AIAA, 2005-05);Reduction of auxiliary oxygen amounts currently used in Pulse Detonation Engines (PDEs) is necessary to compete with existing Ramjet technologies. This paper investigates a Transient Plasma Ignition (TPI) system and finds ...
Singleton, Daniel R.; Sinibaldi, José O.; Brophy, Christopher M.; Kuthi, András; Gundersen, Martin A. (2009-12);The use of a compact solid-state pulse generator and compact igniters for transient plasma ignition in a pulse detonation engine (PDE) is reported and compared with previous results using a pseudospark pulse generator and ...
Wang, F.; Jiang, C.; Kuthi, A.; Gundersen, M.A.; Sinibaldi, C. Brophy and J.0.; Lee, L.C. (AIAA, 2004-01);A transient plasma ignition system has been demonstrated to substantially reduce the ignition delay and detonation-to-detonation transition times for ethylene-air and propane-air mixtures under dynamic fill conditions. The ...