The effect of plasma on the flow features of an axisymmetric jet

The effect of a radio frequency capacitively charged plasma field on a series of axisymmetric flow-fields is investigated in this paper. Particle image velocimetry is utilized to examine the variation of compressibility on axisymmetric jets of Nitrogen gas through a series of perfectly matched converging diverging nozzles and varying pressure ratios. Mean flow velocity measurements as well as turbulent fluctuating parameters are examined to determine differences in the flow between baseline (plasma off) and plasma on. Additionally, a series of more turbulent axisymmetric flowfields, created by developing flow in a constant diameter pipe, are investigated for plasma-turbulence interactions. Finally, electrode designs are modified in an attempt to increase plasma interaction with the flowfield. Results generally indicate that the plasma interaction with the shear layer is responsible for heating the shear layer and delaying jet-core breakdown.