High-frequency fluidic oscillator

There is a number of potential applications for no-moving-part fluidic oscillators if they could oscillate in the kilohertz range and yet be of convenient, i.e. not too small size. The solution offered in this paper is based on a new oscillation principle, with stationary rotating vortex inside the chamber bounded by two attachment walls. The response to gradually increasing air flow rate has shown three distinct regimes, of prime importance being the constant Strouhal number regime at small Reynolds numbers from Re similar to 2600 to Re similar to 6000, oscillating at f = 1.7 kHz and f similar to 5 kHz, respectively. Even higher frequency f similar to 8.2 kHz was found in another, higher Re regime. (C) 2015 Elsevier B.V. All rights reserved.