Experimental Characterization of a Lean Prevaporized Premixed Combustor for Supersonic Transport Applications

View Video Presentation: https://doi.org/10.2514/6.2022-2347.vid Emissions and optical diagnostics were used to characterize a novel lean premixed pre-vaporized (LPP) combustor of relevance to future commercial supersonic transport (CST) applications. The burner consists of four annular flames with cylindrical bluff bodies, stabilized by a swirling pilot flame. Experiments were performed at pressures at and above nominal cruise, with various air inlet temperatures and fuel/air ratios. NOx, CO and unburnt hydrocarbons (UHC) emissions were measured using a traversable water-cooled probe. OH* chemiluminescence, fuel droplet Mie scattering, fuel vapor planar laser induced fluorescence and 2D laser induced incandescence were used to describe the heat release distribution, any residual fuel spray, fuel/air mixing and nonvolatile particulate matter, respectively. The optical diagnostics demonstrate flame …