Ignition process in a large aspect ratio supersonic combustor based on multi-strut with liquid kerosene

The annular scram combustor is a popular configuration for combined engines owing to its compatibility with both turbines and rockets ability withstand high flame temperatures. However, significant challenge associated this design the large width of combustor, which can make it difficult establish stabilize flames at supersonic speeds. To address issue, under conditions Tt = 1680 K, Pt 1.64 MPa, Ma 2.7 inlet some experimental studies have been carried out in fan-shaped width-to-height fueled liquid kerosene based on single-strut multi-strut. ignition development were captured analyzed using high-speed camera, establishment process was compared across different equivalence ratios. results revealed that injection method consisted central-flame stage weak strength. multi-strut condition involved two stages: downstream propagation cross-flame countercurrent propagation. improved performance by increasing fuel diffusion range reducing airflow speed. central further classified into four states characteristics ratios: diffusion-weak state, diffusion-strong contraction-weak contraction-strong state. state had effect flame-crossing process. multi-struts when