To investigated ignition and limit blow-out(LBO) of a single trapped vortex combustor(cavity fueled only) test rig with kerosene as fuel

experiments were conducted in various inlet main air conditions and temperatures of premixed air.The experiment results indicate that the temperature of premixed air would improve ignition and LBO obviously

but the cavity air is a key factor.There is a critical value for main air

and the single trapped vortex combustor could obtain the best ignition performance.It becomes difficult for ignition when Mach number of main air is 0.59.