scholarly journals The Role of Instability Waves in Predicting Jet Noise

2003 ◽  
Author(s):  
M. Goldstein ◽  
Louis Handler
Keyword(s):  
Jet Noise ◽  
Instability Waves

scholarly journals The role of instability waves in predicting jet noise

2005 ◽  
Vol 525 ◽  
pp. 37-72 ◽  
Author(s):  
M. E. GOLDSTEIN ◽  
S. J. LEIB
Keyword(s):  
Jet Noise ◽  
Instability Waves

Erratum on Role of Jet Temperature in Correlating Jet Noise

AIAA Journal ◽  
2010 ◽  
Vol 48 (2) ◽  
pp. 510-511
Author(s):  
K. Viswanathan ◽  
M. J. Czech
Keyword(s):  
Jet Noise

scholarly journals A Study of the Role of Organized Structures in Jet Noise Generation

2003 ◽  
Author(s):  
Ramons Reba ◽  
Satish Narayanan ◽  
Tim Colonius ◽  
Mary Dunlop
Keyword(s):  
Jet Noise ◽  
Noise Generation

The role of shear-layer instability waves in jet exhaust noise

1977 ◽  
Vol 80 (2) ◽  
pp. 321-367 ◽  
Author(s):  
C. J. Moore
Keyword(s):  
Shear Layer ◽  
Large Scale ◽  
Broad Band ◽  
Jet Noise ◽  
Acoustic Power ◽  
Thermal Fluctuations ◽  
Excess Noise ◽  
Number Range ◽  
Instability Waves ◽  
Noise Measurements

Large-scale structures in the form of instability waves are an inherent part of a shearlayer mixing process. Such structures are shown to be present in an acoustically and aerodynamically well behaved jet even at high Mach numbers. They do not directly radiate significant acoustic power in a subsonic jet, but do govern the production of the turbulent fluctuations which radiate broad-band jet noise. Over the whole subsonic Mach number range, a significant increase in jet noise can be produced by exciting the shear layer with a fluctuating pressure at the nozzle of only 0·08 % of the jet dynamic head but with the correct Strouhal number. Such excitation by internal acoustic, aerodynamic or thermal fluctuations could explain the variability of jet noise measurements between different rigs and could also be responsible for some components of ‘excess’ noise.

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