Effect of small pressure disturbances on the breakdown of round laminar and turbulent jets
Gikas, Zacharias Z.
Miller, James A.
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The objective of the present work was to experimentally investigate the effect of small sinusoidal perturbations on the breakdown of circular water jets issuing from long tubes aiming to examine how the mean velocity profile for a fully developed laminar, transitional and turbulent flow as well as the frequency affects the mechanism of breakdown of the jet flow. Observations using a high frequency stroboscope were recorded using a high speed photographic technique, for the most distinctive phenomena observed, for three selective Reynolds numbers corresponding to laminar, transitional and turbulent flow. Markedly difference behavior if flow breakdown and droplet formation was observed for each of these flows as frequency waveform or phase angle was altered.
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