Structure of a swirl-stabilized spray flame by imaging, laser doppler velocimetry, and phase doppler anemometry

Numerical and experimental investigation on droplet dynamics and dispersion of a jet engine injector

“…Experimental studies on swirled spray flows have demonstrated that droplet dynamics become a complex combination of several phenomena like aerodynamic transport of droplets, turbulent mixing and centrifugal effects (Edwards and Rudoff, 1991;McDonell et al, 1988;Hardalupas et al, 1990;Bulzan, 1993). These studies revealed an occurrence of a predominant coherent structure within the flow field defined as the precessing vortex core (PVC).…”

Spray flame structure of rapeseed biodiesel and Jet-A1 fuel

“…For spray flames established from a twin-fluid atomizer, the vapour cloud formed from droplet vaporisation burns largely as a turbulent gas diffusion flame [8]. The flame boundary envelopes the spray boundary, where the mixture of fuel vapour and oxidizer meet and reaction occurs [9]. The controlling mechanism for the spray flame structure is dependent upon the droplet-gas interaction and the transport processes that occur within the spray core.…”

Regimes of Spray Vaporization and Combustion in Counterflow Configurations

“…Counterflow structures that move with the mean velocity can be abstracted from the interface dynamics of shear and mixing layers (Corcos and Sherman, 1976). Local counterflow spray configurations are encountered in typical combustion chambers around the stagnation point that forms near the injector exit as a result of vortex breakdown of the swirling air-feed stream (see, for example, Edwards and Rudoff, 1990).…”