The central recirculation zone (CRZ) in a swirl stabilized gas turbine combustor has a
dominant effect on the fuel air mixing process and flame stability. Most of state of the art
swirlers share one disadvantage; the fixed swirl number for the same swirler configuration.
Thus, in a mathematical sense, Reynolds number becomes the sole parameter for
controlling the flow characteristics inside the combustor. As a result, at low load operation,
the generated swirl is more likely to become feeble affecting the flame stabilization and …