Effects of liner pressure loss on combustor lean blow-out and combustion efficienly performances

Based on a liner with 3.0% pressure loss liner, two low pressure loss liners (2.5% and 2.0%) were designed.The light lean ignition experiments were conducted to study the effect of liner pressure loss on the combustor lean blow-out and combustion efficiency.Under the idle conditions, the lean blow-out fuel air ratios of low pressure loss liner were lower than that of the baseline liner, and 2.5% pressure loss liner had the lowest.Under the high pressure and high temperature connditions, the low pressure loss had no effect on the combustion efficiency.Compared with the results of ignition, it was acceptable to reduce the liner pressure to 2.5% without negative effect on the combustion characteristic of combustor.