预混分级低排放燃烧室点火特性研究

An experimental study was conducted on a can combustor under ambient temperature and pressure condition to investigate the influence of combustor inlet air velocity, igniter position and ratio of pilot fuel on lean and rich ignition performance of premixed staged low emission combustor for aero-engines and gas turbine, and the reason was investigated by CFD numerical simulation. The experimental results show that with increment of combustor inlet air velocity, combustor equivalence ratio of lean ignition increases, and change trend of lean ignition performance on different igniter position keeps the same, but that of rich ignition performance is different. With increment of distance of igniter to liner dome, change trend of lean and rich ignition performance is different under the condition of different inlet air velocity. The influence of igniter position on combustor lean and rich ignition performance is little at low inlet air velocity. With increment of distance of igniter, the scope of equivalence ratio of lean and rich ignition decreases at high inlet air velocity. With increment of ratio of pilot fuel, combustor equivalence ratio of lean ignition decreases at low inlet air velocity, the influence weakens little by little. The influence of ratio of pilot fuel on combustor lean ignition performance is very little at high inlet air velocity.