To investigate lean-blow-out (LBO) performance of trapped vortex combustor (TVC) in high inlet flow

experiments were employed by changing Ma and temperature of main air and height to length (H/L) of the cavity.The results of experiments show that:(1) Mach number of main air has great effect on LBO.When Mach number of inlet main air becomes bigger

LBO decreases.As Mach number of inlet conditions varies

the change of LBO is great.(2) Temperature rise of main air is conducive to LBO

but after 600K

the effect is less.(3) LBO decreases when after body of cavity gas amount becomes bigger.(4) When the H/L is 0.88

the best LBO is achieved.