Self-Induced Oscillation of a Jet Issued from a Flip-Flop Jet Nozzle : Ensemble Averaged Velocity and Pressure

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 by the balance of lateral momentum. The mechanism to govern the port pressure change is proposed to complete the oscillation model of the flip-flop jet nozzle.