To reveal the flow field differences and flow characteristics between the non-reacting flow and the reacting flow

the flow fields at different sections of a reverse-flow combustor with different total pressure loss conditions were measured and investigated through particle image velocimetry (PIV) measurement technology. The result showed that: with the increase of the total pressure loss

the non-reacting flow field in the specific section was consistent

the penetrating depth，jet angle，reverse-zone position and size，and the flow line were all similar. Otherwise

the velocity rose. And the reacting flow field in the specific section was also consistent with the increase of the total pressure loss. Also there were some differences from the reacting flow field to the non-reacting flow field in the same total pressure loss condition. The relative motion of fuel injection and airflow will affect the flow field structure of the head zone of the combustor

and the velocity of reaction is faster than the non-reaction.