Original title:
Stochastic regimes in very-low-frequency fluidic oscillator
Authors:
Tesař, Václav Document type: Papers Conference/Event: Experimental Fluid Mechanics 2015 /10./, Praha (CZ), 2015-11-17 / 2015-11-20
Year:
2015
Language:
eng Abstract:
Paper discusses interesting unexpected stochastic regimes discovered in a fluidic oscillator designed for operation at very low oscillation frequencies - without the inconvenience of the long feedback loops needed in standard low-frequency oscillator designs. The new oscillator contains a pair of bistable turn-down active valves operating in anti-parallel — essentially analogous to Abraham & Bloch electric “multibrateur” invented in 1919. Three different self-excited oscillation regimes were found. In the order of increasing supplied flow rate, these regimes are characterised by: (A) generation of stochastic-duration multi-pulse packs, (B) generation of individual pulses with a degree of periodicity, and (C) regime with randomly appearing flow pulses separated by intervals of the order of seconds.
Keywords:
ant-parallel operation; fluidic oscillator; stochastic regimes Project no.: GA13-23046S (CEP) Funding provider: GA ČR Host item entry: Experimental Fluid Mechanics 2015
Institution: Institute of Thermomechanics AS ČR
(web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences. Original record: http://hdl.handle.net/11104/0254897