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|Title:||Mixing characteristics of a flapping jet from a self-exciting nozzle|
|Citation:||Flow Turbulence and Combustion, 2001; 67(1):1-23|
|Publisher:||Kluwer Academic Publ|
|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 www.springerlink.com|
|Appears in Collections:||Mechanical Engineering publications|
Environment Institute Leaders publications
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