A modelling of large eddies in an axisymmetric jet

2008 ◽  
pp. 162-173 ◽  
Author(s):  
E. Acton
Keyword(s):  
Axisymmetric Jet ◽  
Large Eddies

A modelling of large eddies in an axisymmetric jet

1980 ◽  
Vol 98 (1) ◽  
pp. 1-31 ◽  
Author(s):  
E. Acton
Keyword(s):  
Large Scale ◽  
Harmonic Excitation ◽  
Jet Flows ◽  
Substantial Part ◽  
Nonlinear Behaviour ◽  
Axisymmetric Jet ◽  
Model Flow ◽  
Large Eddy ◽  
Large Eddies ◽  
Noise Production

Crow & Champagne (1971), Bechert & Pfizenmaier (1975) and Moore (1977) have observed that the growth, mixing and noise production of jet flows are sensitive to harmonic forcing. This paper describes an attempt to model numerically certain features of these flows. The model flow is restricted to be axisymmetric and is consequently unrepresentative of the detailed structure in a real jet. Nonetheless, it is found that reasonable qualitative agreement exists between the results of the model and experiments as far as the large eddies are concerned. This suggests that a substantial part of the large-scale structure in a jet is essentially axisymmetric. Harmonic excitation is also applied to the model jet and the changes in frequency and amplitude of the excitation cause distinct changes in the wavelengths of the jet eddies. This resulting large-eddy behaviour is consistent with many features of the nonlinear behaviour observed experimentally in forced jets.

The self-excited axisymmetric jet

1982 ◽  
Vol 115 (-1) ◽  
pp. 59 ◽  
Author(s):  
M. A. Z. Hasan ◽  
A. K. M. F. Hussain
Keyword(s):  
The Self ◽  
Axisymmetric Jet

The life of a vortex in an axisymmetric jet

2010 ◽  
Vol 14 (1) ◽  
pp. 5-6 ◽  
Author(s):  
Ramis Örlü ◽  
P. Henrik Alfredsson
Keyword(s):  
Axisymmetric Jet

Active control of an axisymmetric jet with distributed electromagnetic flap actuators

2004 ◽  
Vol 36 (3) ◽  
pp. 498-509 ◽  
Author(s):  
H. Suzuki ◽  
N. Kasagi ◽  
Y. Suzuki
Keyword(s):  
Active Control ◽  
Axisymmetric Jet

On the use of microjets to suppress turbulence in a Mach 0.9 axisymmetric jet

2003 ◽  
Vol 490 ◽  
pp. 75-98 ◽  
Author(s):  
V. H. ARAKERI ◽  
A. KROTHAPALLI ◽  
V. SIDDAVARAM ◽  
M. B. ALKISLAR ◽  
L. M. LOURENCO
Keyword(s):  
Axisymmetric Jet
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