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Type: Journal article
Title: Mixing characteristics of a flapping jet from a self-exciting nozzle
Author: Mi, J.
Nathan, G.
Luxton, R.
Citation: Flow Turbulence and Combustion, 2001; 67(1):1-23
Publisher: Kluwer Academic Publ
Issue Date: 2001
ISSN: 1386-6184
Abstract: Experimental results of the mixing characteristics of a low-frequency flapping jet from a self-exciting nozzle are presented. The simple fluidic device used to generate the flapping motion is also described. The nozzle contains no external trigger and, unlike the flip-flop nozzle of Viets, contains no external feedback path. Both conventional and conditional averaging schemes are employed to characterise the turbulentmixing characteristics of the jet using data obtained from hot-wire anemometry. Flow-visualisation is used to characterise the flapping motion. It is revealed that the dynamic flapping motion enhances the large-scale mixing of the jet while concurrently suppressing the generation of the fine-scale turbulence. The results also indicate that high turbulence intensities, initiated by the flapping motion, are sustained even in the far-field flow region.
Keywords: Fluidic nozzle; oscillating jet; turbulent mixing
Description: The original publication can be found at
RMID: 0020012309
DOI: 10.1023/A:1013544019463
Appears in Collections:Mechanical Engineering publications
Environment Institute Leaders publications

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