Coexistence of acoustic waves and turbulence in low Mach number compressible flows

2019 ◽  
Vol 31 (4) ◽  
pp. 045102 ◽  
Author(s):  
J. Cerretani ◽  
P. Dmitruk
Keyword(s):  
Mach Number ◽  
Acoustic Waves ◽  
Compressible Flows ◽  
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

scholarly journals On the low Mach number limit of compressible flows in exterior moving domains

2016 ◽  
Vol 16 (3) ◽  
pp. 705-722 ◽  
Author(s):  
Eduard Feireisl ◽  
Ondřej Kreml ◽  
Václav Mácha ◽  
Šárka Nečasová
Keyword(s):  
Mach Number ◽  
Compressible Flows ◽  
Low Mach Number ◽  
Low Mach Number Limit ◽  
Moving Domains

Self-generation of organized waves in an impinging turbulent jet at low Mach number

1982 ◽  
Vol 117 ◽  
pp. 425-441 ◽  
Author(s):  
Donald Rockwell ◽  
Andreas Schachenmann
Keyword(s):  
Mach Number ◽  
Phase Difference ◽  
Acoustic Waves ◽  
Near Field ◽  
Turbulent Jet ◽  
Maximum Pressure ◽  
Pressure Amplitude ◽  
Axisymmetric Cavity ◽  
Low Mach Number ◽  
Oscillation Frequencies

Self-generation of highly organized waves in a nominally turbulent jet at very low Mach number can arise from its impingement upon the downstream orifice of an axisymmetric cavity, having an impingement length much shorter than the corresponding acoustic wavelength. The oscillation frequencies are compatible with the resonant modes of a long pipe located upstream of the cavity and with jet-instability frequencies based on the column mode (0·3 [siml ] SD [siml ] 0·6), as well as the near-field shear layer mode (0·016 [siml ] Sθ0 [siml ] 0·03). Moreover, the frequency of the organized wave is constant from separation to impingement; consequently vortex pairing does not occur.Within the cavity, the pressure amplitude associated with the organized wave is directly related to the phase difference between the organized velocity fluctuations at separation and impingement. Maximum pressure amplitude occurs when this phase difference, measured along the cavity (i.e. jet) centre-line, is 2nπ. Streamwise amplitude and phase distributions of the organized wave cannot be explained from purely hydrodynamic considerations; however, they can be effectively modelled by superposing contributions from hydrodynamic and acoustic waves. This aspect has important consequences for externally excited jets as well.

A Semi-implicit Method for Resolution of Acoustic Waves in Low Mach Number Flows

2002 ◽  
Vol 181 (2) ◽  
pp. 545-563 ◽  
Author(s):  
Clifton Wall ◽  
Charles D. Pierce ◽  
Parviz Moin
Keyword(s):  
Mach Number ◽  
Acoustic Waves ◽  
Implicit Method ◽  
Low Mach Number

Error control and adaptivity for low-Mach-number compressible flows

AIAA Journal ◽  
2002 ◽  
Vol 40 ◽  
pp. 2234-2240
Author(s):  
M. Sabanca ◽  
G. Brenner ◽  
E. Durst
Keyword(s):  
Mach Number ◽  
Error Control ◽  
Compressible Flows ◽  
Low Mach Number
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