The combustion characteristics of the self-stabilized dual-swirler cup in the unconfined case

which is suitable for the tangential trapped vortex combustor

were investigated experimentally.The self-stabilized dual-swirler cup is characterized in that

the dual-swirler with radial holes is employed

and the fuel sprays from a pressure nozzle in the center.According to the different swirl numbers and air flux distributions of the swirler

different layouts are developed.In the experiment under normal temperature and pressure

RP-3

for example

was used as the fuel.Results show that

the flame stability increases and the length and shape of the flame remain unchanged with the decrease of the air flux distribution of the internal swirl and increase of its swirl number.