Initiation and Modification of Reaction by Energy Addition: Kinetic and TransportPhenomena

摘要

Work has been pursued, by application of the fundamental principles of chemicalkinetics and fluid transport, on proof of principle for a noval oblique-detonation-wave engine (ODWE) as an alternative to a mixing-controlled supersonic combustor. The concept involves the nonintrusive stabilization of a conical detonation wave. Laser technology permits the rapidly repeated pulsed deposition of energy at a fixed site on the axis of symmetry of a supersonically flowing, combustible mixture. Each pulse suffices for the direct initiation of a radially outwardly propagating, Chapman-Jouguet detonation wave. The interaction of the individual spherical waves, as the periodic train is convected by the flow, results in a nonintrusively stabilized conical wave, as the time interval between the very brief pulses decreases. The detonated gas may be expanded in a supersonic nozzle (of practical length) for discharge at ambient pressure, such that thrust is generated. (Author).