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The behaviour of excited plane jets

Narayanan, Badri MA (1988) The behaviour of excited plane jets. In: Sadhana : Academy Proceedings in Engineering Sciences, 12 . pp. 31-43.

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A plane subsonic jet can be excited to entrain more fluid from its surroundings by subjecting it to antisymmetric periodic disturbances. The essential feature in this phenomenon is the rolling-up motion of an initially flapping jet to form large vortices which are responsible for greater entrainment. Several methods developed to impart oscillations to the flow at the nozzle, such as the acoustic pressure oscillator, the vibration of a single vane in the potential core region, the reciprocating lip system and the twin vane exciter, are described in this article. A minimum threshold in amplitude is necessary for exciting the flow. However, the frequency of oscillation is much less than that predicted by stability considerations.

Item Type: Journal Article
Publication: Sadhana : Academy Proceedings in Engineering Sciences
Publisher: Indian Academy of Sciences
Additional Information: Copyright of this article belongs to Indian Academy of Sciences.
Keywords: Jet;unsteady flows;vortex dynamics;jet excitation.
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited: 11 Oct 2010 09:11
Last Modified: 11 Oct 2010 09:11
URI: http://eprints.iisc.ac.in/id/eprint/33018

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