Trapped-vortex combustor(TVC) is a novel and compact gas turbine combustor with two pilot zones and a main zone.The pilot zone utilizes cavities to establish the recirculation zone needed for stable combustion

and the main zone is for power.In the research

inlet air pressure was fixed;with different inlet temperatures and inlet air flowrates

experiments were conducted to study TVC performance including pressure loss

ignition limit

lean blowout limit(LBO) and combustion efficiency.Experimental result shows total pressure loss increases from 3%～6% vary with increasing the inlet Mach number of the main zone

the flow drag coefficient is 24～25 which changes little with the inlet air flowrate.Ignition limit and LBO is independent on the inlet air flowrate

and improves with increasing inlet temperature from 300 to 500 K.The fuel/air ratio of ignition limit and LBO is 0.011 and 0.004 5 respectively.When cavity is fueled only

the combustion efficiency of TVC is 90%～95%.When the cavity and main zone are fueled together

the efficiency increases(84%～99.5%) with decreasing the fuel/air ratio.