Abstract
Flow and pressure in a fluidic oscillator attached to a plane turbulent jet are studied experimentally by using hot-wire anemometers and semiconductor pressure transducers. Ensemble averaged velocities and pressures are deduced to examine the dynamics of the oscillating flow field. The measured port pressure difference can simulate the flow in the connecting duct and explains the jet deflection well. The variation of port pressure with duct flow rate is examined by air injection test and it is concluded that the port pressures are controlled by the balance of jet entrainment and air supply in the control ports. The switching process is explained well in terms of this mechanism.
