Compressible and confined vortex flow

Wilkinson, J., Motamed-Amini, A. and Owen, I. (1988) Compressible and confined vortex flow. International Journal of Heat and Fluid Flow, 9 (4). pp. 373-380. ISSN 0142-727X

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The internal compressible flow of a thin vortex chamber was investigated experimentally by measuring the radial distribution of temperature and pressure, from which the velocity field was calculated. The bulk of the internal vortex was found to be described by uθr0.69 = constant. The total resistance of the vortex chamber to the flow was also investigated in the context of fluidic vortex diode behavior under conditions of compressible and choked flow. It was found that the vortex chamber choked at an upstream-to-downstream pressure ratio of about 6 and in doing so passed a mass flow rate of 28 of the equivalent one-dimensional ideal nozzle. The resistance of vortex chambers is known to be strongly influenced by the presence of reversed flow in the exit due to vortex breakdown. Schlieren photography of the swirling exhaust flow was used to show that, while vortex breakdown does occur, it can only do so after the flow has become subsonic downstream of the exit and cannot therefore influence the vortex chamber resistance. © 1988.

Keywords:Fluidics, Compressible Vortex, Confined Vortex, Power Fluidics, Vortex Breakdown, Vortex Diodes, Vortex Throttles, Flow of Fluids
Subjects:H Engineering > H100 General Engineering
H Engineering > H141 Fluid Mechanics
Divisions:College of Science > School of Engineering
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ID Code:18296
Deposited On:20 Aug 2015 08:17

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