INFLUENCE OF LOW MACH NUMBER SHEAR FLOW ON ACOUSTIC PROPAGATION IN DUCTS

2001 ◽  
Vol 246 (1) ◽  
pp. 137-155 ◽  
Author(s):  
V PAGNEUX ◽  
B FROELICH
Keyword(s):  
Mach Number ◽  
Shear Flow ◽  
Acoustic Propagation ◽  
Low Mach Number

Standing acoustic waves in a low Mach number shear flow

AIAA Journal ◽  
1992 ◽  
Vol 30 (7) ◽  
pp. 1708-1715 ◽  
Author(s):  
Meng Wang ◽  
David R. Kassoy
Keyword(s):  
Mach Number ◽  
Shear Flow ◽  
Acoustic Waves ◽  
Low Mach Number

Numerical Prediction of Low Mach Number Jet Noise Ejected From Slit Nozzle

2011 ◽  
Author(s):  
Minoru Yamaguchi ◽  
Yusuke Iwata ◽  
Sadao Akishita ◽  
Yoshifumi Ogami
Keyword(s):  
Mach Number ◽  
Shear Flow ◽  
Green’S Function ◽  
Green's Function ◽  
Jet Noise ◽  
Frequency Range ◽  
Sound Emission ◽  
Low Mach Number ◽  
Number Flow ◽  
Low Mach Number Flow

Prediction of the low Mach number jet noise ejected from rectangular nozzle with high aspect ratio is described. Firstly measurement of the jet noise was conducted in semi-anechoic wind tunnel at the low Mach number flow condition. We were found that the sound power of the jet obeyed 6-th power of jet velocity. This means the jet noise is resulted not from quadrupole distribution in the shear flow of jet, but from dipole distribution on the surface of the exit of the nozzle. The model of vortex sound is applied as the sound generation mechanism at numerical simulation. The sound emission from the vortices in the shear flow is modified with the compact Green’s function representing the scattering effect from the surface of the exit of the nozzle in the lower frequency range. It is also modified with the non-compact Green’s function in the higher frequency range. Lastly calculated sound spectra are compared with measured spectra. The comparison will prove effectiveness of this modeling.

scholarly journals Low Mach number fluctuating hydrodynamics for electrolytes

2016 ◽  
Vol 1 (7) ◽  
Author(s):  
Jean-Philippe Péraud ◽  
Andy Nonaka ◽  
Anuj Chaudhri ◽  
John B. Bell ◽  
Aleksandar Donev ◽  
...  
Keyword(s):  
Mach Number ◽  
Fluctuating Hydrodynamics ◽  
Low Mach Number

scholarly journals An interface capturing method for liquid-gas flows at low-Mach number

2021 ◽  
Vol 216 ◽  
pp. 104789
Author(s):  
Federico Dalla Barba ◽  
Nicoló Scapin ◽  
Andreas D. Demou ◽  
Marco E. Rosti ◽  
Francesco Picano ◽  
...  
Keyword(s):  
Mach Number ◽  
Gas Flows ◽  
Low Mach Number ◽  
Interface Capturing
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