每年出版 4 期
ISSN 打印: 1065-3090
ISSN 在线: 1940-4336
Indexed in
FLOW VISUALIZATION STUDIES OF JETS IN THE PRESENCE OF LOUD PURE TONES
摘要
Loud pure hole tones between 2300 and 10,000 Hz were induced in a jet by establishing turbulent flow of gaseous nitrogen through a rectangular chamber with a sharp-edged orifice at the exit. Visual observations of the jet and velocity measurements indicated a very drastic spread of the jet near the orifice exit in the presence of the loud pure tones. The potential core appeared to be no longer present and the flow-field became asymmetric. The enhanced spread of the jet and the asymmetry were not observed when the flow field had a broad-band frequency spectrum. Wavelet analysis of the instantaneous planar Mie scattering flow images was performed with a view to qualitatively study and compare the entrainment and mingling in two jets with and without acoustic self-excitation.
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Varun A. V., Balasubramanian K., Sujith R. I., An automated vortex detection scheme using the wavelet transform of the d 2 field, Experiments in Fluids, 45, 5, 2008. Crossref
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Munjal M. L., Ramamurthi K., Glimpses of Aeroacoustic Activities in India, International Journal of Aeroacoustics, 7, 3-4, 2008. Crossref
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Munjal , Ramamurthi , Glimpses of aeroacoustic activities in India, Noise Notes, 8, 3, 2009. Crossref