Plasma actuator configuration tested including a definition of the important geometric parameters and a schematic of the control volume used in the analysis.
Applied voltage against consumed power for two dielectric thicknesses (f = 4 kHz).
Variation of the maximum average velocity, um , and body force, fb,x against applied voltage, Vpp (td = 0.36 mm and f = 4 kHz).
(a) Normalized velocity profiles at x = 25 mm downstream of the exposed electrode trailing edge for Config. K1 (filled symbols for Vpp > 10 kV) and (b) Reynolds number against the standard deviation in the u component of velocity at two fixed locations and three dielectric thicknesses.
Effect of dielectric thickness on the maximum average velocity, um , and body force, , against applied voltage, Vpp .
Plasma length, , and the relative standard deviation of the plasma length, , against operating voltage, Vpp (td = 0.36 mm and f = 4 kHz). Labels next to the symbols quote the standard deviation at each voltage.
Variation of the maximum average velocity, um , and body force, against plasma length, Δx, for Config. K1 (td = 0.36 mm and f = 4 kHz).
Ensemble averaged velocity magnitude contours for actuator Config. K1 at different phases of the AC cycle for Vpp = 10 kV.
Variation of (a)–(c) u and v-velocity probed at (x, y) = (2, 0.5) and (d)–(f) body force, , against phase angle, , for Config. K1 at three different voltages. To indicate the phase between u, v, and and the applied voltage Vpp , the latter is included to the diagrams (solid lines, right ordinates). Note: the data for are copy of the data between and the scales change for each applied voltage.
(a) Cyclogram of the average maximum phase velocity, , against corresponding x location, , for Vpp = 7 kV indicated by the black line with the extent of variation at each phase represented by the enclosed shapes and (b)–(c) the equivalent normalized average trends with the y-axis non-dimensionalized by um and the x-axis by (b) the corresponding location, xm and (c) the plasma length, for all three voltages.
Actuator configurations and test matrix implemented in the experiments. Note: all dimensions are in mm unless otherwise stated. For all actuators wa = 6.35 mm, wb = 19.05 mm, and te = 80 μm.
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