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Numerical Simulations of Jets Exhausting from Elliptic Nozzles without and with Conic Plug
Aerospace Engineering, University of Cincinnati.ORCID iD: 0000-0001-7330-6965
Aerospace Engineering, University of Cincinnati.
2008 (English)In: Proceedings of Int. Conf. on Jets, Wakes and Separated Flows, ICJWSF-2008, 2008Conference paper (Refereed)
Abstract [en]

Computational Fluid Dynamics was employed to model spatially developing turbulent jets issued from a low aspect ratio elliptic nozzle and from an elliptic plug nozzle. Results from Large Eddy Simulation and steady Reynolds-Averaged Navier-Stokes modeling of a benchmark elliptic jet exhausting from a 2:1 aspect ratio nozzle are compared. It was observed that only LES captured the axis-switching phenomenon. Further on, LES was used to calculate the flow exhausting from an elliptic plug nozzle. In this case the simulations predicted that a bifurcated jet is generated. The jet bifurcates just downstream of the center-body tip in the major-axis plane and the two potential core regions diverge as the jet spreads. The obtained data are presented in terms of instantaneous, time-averaged, and fluctuating quantities and are supported by experimental measurements.

Place, publisher, year, edition, pages
National Category
Fluid Mechanics and Acoustics
URN: urn:nbn:se:kth:diva-48731OAI: diva2:458417
Int. Conf. on Jets, Wakes and Separated Flows, ICJWSF-2008
QC 20111124Available from: 2011-11-22 Created: 2011-11-22 Last updated: 2011-11-24Bibliographically approved

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Mihaescu, Mihai
Fluid Mechanics and Acoustics

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