The objective of this numerical study is to develop algorithms to model significant flow mechanisms observed in an acoustically excited jet. The shear layer is represented by its nonlinear endproduct, a series of regularly shed, discrete, axisymmetric vortices. We examine the case for which shear-layer and jet instabilities are strongly coupled. Feedback from the end of the potential cone is represented as an abrupt decrease of circulation of each vortex. Two models are discussed: one does not consider jet-pipe wall boundary conditions; the other does so using dipole rings. Results are presented for a range of parameters and indicate that the observed characteristics of the jet can be successfully predicted for use in subsequent noise calculations. (Krautzig)
Discrete vortex modelling of an axisymmetric jet flowfield
Diskrete Wirbelmodellierung eines rotationssymmetrischen Duesenstromfeldes
AIAA-Papers ; 1-10
1980
10 Seiten, 11 Bilder, 2 Tabellen, 16 Quellen
Conference paper
English
Chemically reacting axisymmetric flowfield prediction
AIAA | 1984
|Wake-Vortex Alleviation Flowfield Studies
Online Contents | 2005
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