Aging Characteristics of SDBD Plasma Actuator With Polyimide Driven by a Nanosecond Pulsed Power Supply

Abstract

To systematically study the effects of the pulse width, rising edge and falling edge of nanosecond pulse voltage on the discharge aging characteristics of SDBD plasma actuator, taking the discharge image, the discharge energy, the surface temperature of the plasma actuator, the hydrophobicity after the aging of the actuator, the thermal stability and the surface topography, etc. into account, we analyzed the influences of the change of each parameter on the aging degree of the polyimide SDBD plasma actuator, and established the connection between SDBD discharge characteristics and aging characteristics. The experimental results show that, as the pulse width increases, the aging degree of the plasma actuator increases continuously. When the pulse width is 1 μs, the aging degree of the plasma actuator that can affect the pulse width parameter reaches the maximum value; when the pulse width continues to increase, the degree of aging will be weakened. The steeper the rising edge, the stronger the discharge energy and the thermal effect, the stronger the aging degree of the plasma actuator. When the rising edge is 50 ns, the aging degree of the plasma actuator is the most severe; At the same rising edge, the steeper the falling edge, the stronger the aging of the plasma actuator. However, compared with the effects of rising edge and pulse width, the effect of the changes in the falling edge parameters is almost negligible.