Currently, a new generation of scientific aerospace vehicles, using advanced hypersonic airbreathing propulsion based on supersonic combustion technology, is in development at several research centers [1]. The 14-X Brazilian Hypersonic Aerospace Vehicle, Figure 1, designed by Rolim et al. [2], at the Prof. Henry T. Nagamatsu Laboratory of Aerothermodynamics and Hypersonics, Figure 2, at the Ins...

A fueled cavity in a supersonic crossflow was ignited via pulse detonator (PD) producing detonation waves that were then decoupled to produce varying degrees of shock-flame separation at the exit PD tube. This decoupling allowed for observation ignition mechanism, and key parameters required successful identified. Measurements made using high-frame-rate OH Planar Laser-Induced Fluorescence (PLI...

Abstract To clarify the effect of pulsed plasma on scramjet combustor and find best area in cavity, effects pressure distribution, velocity transverse jet cross-sectional area, turbulent kinetic energy total loss were analyzed at different position areas when discharge frequency was 8 kHz under condition incoming flow Ma=1.7 cold flow. The results show that is slightly stronger than constant pl...

Detailed numerical simulations of premixed and non-premixed C2H4/air flames were conducted, using six available kinetic mechanisms. The results help assess differences between these mechanisms and are of interest to proposed hydrocarbon-fueled SCRAMJET concepts, in which C2H4 can be expected to be a major component of the thermally cracked fuel. For premixed flames, laminar flame speeds were ca...