Development and characterization of plasma actuators for high-speed jet control

Joule heating flow control methods for high-speed flows

“…47,48 53 These actuator control the flow using the same concept as the other surface plasma actuator technologies, rapid heating of the fluid due to the pulsed electrical discharges i.e Joule heating. This rapid heating results in the formation of pressure waves that impact the flow field.…”

“…by Samimy et al 53 it was determined that without shielding from the flow, the plasma would be stretched and blown off during each discharge. To prevent this phenomenon a simple groove was cut 1mm deep to house the actuators (see figure 12).…”

“…Samimy et al 53 showed that although the plasma behaviour itself is similar at high input frequencies, there is a reduction in peak voltage and current.…”

“…Samimy et al 53 also compared the power consumption at different frequencies with and without the groove to house the actuator electrodes. As expected, at lower frequencies, the ring groove results in a significant reduction in power consumption.…”

“…The first investigation of LAFPA's for high-speed jet control was in by Samimy et al 53 It was suggested that the actuators could exert control over the flow in one of two ways:…”