Active flow control using synthetic Jet Actuator

A synthetic jet has been designed using CEDRAT APA200M actuator and the jet is characterized experimentally using pitot, hop wire measurements. The synthetic jet gives the maximum output when the driving frequency reaches its resonance frequency of the vibrating diaphram or acoustic resonance frequency of the cavity (Helmholtz resonance frequency).the change in cavity volume shows that there is increase in jet velocity with decrease in cavity volume but it doesn’t shows any change velocity peak frequency the effect of synthetic jet on flow field over the airfoil (NACA-4415) at freestream velocity of 10m/s and the angle of incidence of 14°. The flow has been separated on the airfoil around x/c=0.864 and the flow separation has been suppressed when the synthetic jet is on. The jet also modifies the boundary layer characteristics of displacement thickness, momentum thickness and shape factor