Abstract
The effect of a rearward-facing step on plasma ignition in supersonic flow was experimentally and numerically investigated. The rearward-facing step was installed between a plasma jet injector and a fuel injector in order to enhance ignition and combustion. However, the installation of the step resulted in decrease in wall pressure increase due to combustion. Numerical simulation reveals that the fuel injected behind a rearward-facing step was diffused widely in the recirculation zone, but high temperature PJ plume hardly diffused in this recirculation zone. Therefore, the recirculation zone behind a rearward-facing step was not suitable for ignition and flameholding. These results were consistent with the trends in the ignition experiment.
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