Effects of liner pressure loss on combustor ignition performances

Based on a combustor of 3.0% liner pressure loss, two low pressure loss liners ( 2.5% and 2.0% ) were designed. The light lean ignition experiments and numerical simulation were conducted to study the effect of liner pressure loss on the combustor ignition performance. On the condition of pressure drop less than 3%, the ignition performances were almost the same. On the condition of pressure drop greater than 3%, the ignition performances of low liner pressure loss were better than that of the baseline liner, and 2.5% pressure loss liner was the best of the overall ignition performance. Combined with numerical simulation results, the flow structure of liner of 2.0% pressure loss was significantly different from that of the baseline liner, which had a negative effect on the performance of ignition. The flow structure of liner of 2.5% pressure loss was similar with that of the baseline liner, which had a positive effect on the performance of ignition.