Numerical Simulations of Jets Exhausting from Elliptic Nozzles without and with Conic Plug
2008 (English)In: Proceedings of Int. Conf. on Jets, Wakes and Separated Flows, ICJWSF-2008, 2008Conference paper (Refereed)
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
Fluid Mechanics and Acoustics
IdentifiersURN: urn:nbn:se:kth:diva-48731OAI: oai:DiVA.org:kth-48731DiVA: diva2:458417
Int. Conf. on Jets, Wakes and Separated Flows, ICJWSF-2008
QC 201111242011-11-222011-11-222011-11-24Bibliographically approved