Quantum mechanics

Control (management)

Phase (matter)

Engineering

Aerospace engineering

Materials science

Fluidics

Telecommunications

Economics

Computer science

Jet (fluid)

Injection locking

Laser

Physics

Optics

Flow (mathematics)

Synchronization (alternating current)

Artificial intelligence

Momentum (technical analysis)

Finance

Channel (broadcasting)

Control theory (sociology)

Mechanics

Flow visualization

Electrical engineering

AIAA Journal

The relative phase of oscillating jets from a pair of fluidic oscillators was synchronized in this work. The means for this synchronization was mutual interaction through a shared feedback channel between the two oscillators. Flow visualization and hot-wire measurements indicated a strong correlation and phase synchronization between the two oscillators. A numerical analysis offered better understanding of the internal flow physics that led to the synchronization phenomenon. A portion of the output jet from one fluidic oscillator was redirected and crossed over into the adjacent oscillator, leading to momentum transfer between the two oscillators. A portion of this cross-oscillator flow was directed into the shared feedback channel and constituted the main feedback flow. In this process, one of the shared feedback channel outlets was blocked by a vortex, allowing only one oscillator to receive feedback flow. The primary mechanism for in-phase synchronization was the cross-oscillator flow, which was divided into phase-modulated momentum injection to the primary jet and modulated flow input to the shared channel feedback channel.

Phase-Synchronized Fluidic Oscillator Pair