Dynamics of acoustic resonance scattering from spherical targets: Application to gas bubbles in fluids

1978 ◽  
Vol 64 (S1) ◽  
pp. S129-S129
Author(s):  
Ameenah R. Farhan ◽  
J. George ◽  
G. Mezzorani ◽  
A. Nagl ◽  
K. A. Sage ◽  
...  
Keyword(s):  
Gas Bubbles ◽  
Acoustic Resonance ◽  
Resonance Scattering

Dynamics of acoustic resonance scattering from spherical targets: Application to gas bubbles in fluids

1979 ◽  
Vol 66 (4) ◽  
pp. 1161-1172 ◽  
Author(s):  
H. Überall ◽  
Jacob George ◽  
Ameenah R. Farhan ◽  
G. Mezzorani ◽  
A. Nagl ◽  
...  
Keyword(s):  
Gas Bubbles ◽  
Acoustic Resonance ◽  
Resonance Scattering

The effects of material attenuation on acoustic resonance scattering from cylindrical tubes

Ultrasonics ◽  
1996 ◽  
Vol 34 (7) ◽  
pp. 737-745 ◽  
Author(s):  
Jong Po Lee ◽  
Ji Ho Song ◽  
Myoung Seon Choi
Keyword(s):  
Acoustic Resonance ◽  
Resonance Scattering ◽  
Cylindrical Tubes

scholarly journals Flash Atomization: A New Concept to Control Combustion Instability in Water-Injected Gas Turbines

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
Vishwas Iyengar ◽  
Harold Simmons ◽  
David Ransom
Keyword(s):  
Gas Turbines ◽  
Mechanical Energy ◽  
Combustion Instability ◽  
Water Injection ◽  
Combustion Process ◽  
Gas Bubbles ◽  
Acoustic Resonance ◽  
Fretting Wear ◽  
Additional Energy ◽  
Large Water

The objective of this work is to explore methods to reduce combustor rumble in a water-injected gas turbine. Attempts to use water injection as a means to reduce NOXemissions in gas turbines have been largely unsuccessful because of increased combustion instability levels. This pulsation causes chronic fretting, wear, and fatigue that damages combustor components. Of greater concern is that liberated fragments could cause extensive damage to the turbine section. Combustion instability can be tied to the insufficient atomization of injected water; large water droplets evaporate non-uniformly that lead to energy absorption in chaotic pulses. Added pulsation is amplified by the combustion process and acoustic resonance. Effervescent atomization, where gas bubbles are injected, is beneficial by producing finely atomized droplets; the gas bubbles burst as they exit the nozzles creating additional energy to disperse the liquid. A new concept for effervescent atomization dubbed “flash atomization” is presented where water is heated to just below its boiling point in the supply line so that some of it will flash to steam as it leaves the nozzle. An advantage of flash atomization is that available heat energy can be used rather than mechanical energy to compress injection gas for conventional effervescent atomization.

Acoustic Resonance Scattering

1994 ◽  
Vol 95 (5) ◽  
pp. 2786-2786 ◽  
Author(s):  
Kevin Williams
Keyword(s):  
Acoustic Resonance ◽  
Resonance Scattering

Acoustic resonance scattering by a penetrable cylinder

1983 ◽  
Vol 73 (5) ◽  
pp. 1448-1455 ◽  
Author(s):  
Donald Brill ◽  
G. C. Gaunaurd
Keyword(s):  
Acoustic Resonance ◽  
Resonance Scattering

Electromagnetic and acoustic resonance scattering theory

Wave Motion ◽  
1983 ◽  
Vol 5 (4) ◽  
pp. 307-329 ◽  
Author(s):  
H. Überall ◽  
P.J. Moser ◽  
J.D. Murphy ◽  
A. Nagl ◽  
G. Igiri ◽  
...  
Keyword(s):  
Scattering Theory ◽  
Acoustic Resonance ◽  
Resonance Scattering
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