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Combustion of a turbulent jet with parabolic mean velocity profile with the flame lifted from the nozzle exit (outflow velocity is 15 m/s, Reynolds number is about 5100)

Project: Visualization of Mechanical Processes
Journal: Visualization of Mechanical Processes: An International Online Journal
Article: FEATURES OF PROPANE COMBUSTION IN ROUND AND PLANE MACRO - AND MICROJET IN THE TRANSVERSE ACOUSTIC FIELD AT SMALL REYNOLDS NUMBERS
Topics: Gas dynamics, Turbulence, Thermodynamics of Combustion, Nozzles, Visualization techniques, Acoustics

Experimental studies of gaseous fuel combustion in a round jet at the nozzle exit show that the combustion of a laminar jet with the flame attached to the nozzle exit takes place at low jet velocity. As the flow velocity increases, combustion of the turbulent jet with the flame lifted from the nozzle exit is observed. It is possible to clearly see the ring structure at the end of the turbulent jet flame separated from the nozzle exit, which demonstrates the flow propagation in a narrow region on the periphery of the jet.