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TsAGI Science Journal

ISSN Print: 1948-2590
ISSN Online: 1948-2604

TsAGI Science Journal

DOI: 10.1615/TsAGISciJ.2013007406
pages 813-820

DIRECT OBSERVATION OF REFRACTION AND SCATTERING OF SOUND ON VORTICES AND RADIATION OF SOUND BY VORTICES IN SUBSONIC TURBULENT JETS AT AEROACOUSTIC INTERACTION

Valeriy Gdalyevich Pimshtein
Central Aerohydrodynamic Institute (TsAGI), Zhukovsky St. 1, Zhukovsky, 140180, Russia

ABSTRACT

The results of direct observation on the base of shadowgraph examination for the processes of interaction of the sawtooth finite-amplitude sound waves with subsonic turbulent jets are shown. Such form of the sound waves, which are visible on the shadowgraphs, allows their changes at interaction with the vortices, generated by these waves earlier, to be observed. The phenomena of refraction and scattering of sound waves on ring and oblique vortices and sound radiation by ring vortices in subsonic turbulent jets are considered.

REFERENCES

  1. Eldredge, J. D. , The acoustics of two-dimensional leapfrogging vortices.

  2. Kopiev, V. F. and Ostrikov, N. N. , Corona discharge microjets as possible actuators for jet noise control.

  3. Pimshtein, V. G. , On acoustic radiation at the interaction of vortices in turbulent jet.

  4. Pimshtein, V. G. , Sound waveform effect on disturbance generation in turbulent jets at aeroacoustic interaction.

  5. Pimshtein, V. G. , Album "Aeroacoustic interactions in turbulent jets".

  6. Vlasov, E. V. and Ginevskii, A. S. , Coherent structures in turbulent jets and wakes, in Advances in Science and Engineering.

  7. Weeks, T. M. and Dosanjh, D. S. , Sound generation by shock-vortex interaction.


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