Under different fuel-air ratios

the effects of geometric parameters of dual-stage swirler and the arrangement of primary holes

on combustion performance(exit temperature distribution

combustion efficiency

lean blowout limit and pollutant emission) of single-head rectangle combustor are studied experimentally.The experimental results show that

the geometric parameters of dual-stage swirler and the arrangement of primary holes(swirler passage area

swirl vane angle of the primary and secondary swirler

the distance of the flare exit from throat

etc) have great influence upon the combustion performance of combustor

but the effects decrease with the reduction of fuel-air ratio.