...Omar Afifi; Atef Mohany Flow-excited acoustic resonance is a design concern in many industrial applications. If not treated, it may lead to excessive vibrational loads, which could subsequently result in premature structural failure of critical equipment. For the case of tube bundles in heat...

...: Jong Chull Jo. 25 08 2013 05 04 2014 Gas flow over ducted cavities can excite strong acoustic resonances within the confined volumes housing the cavities. When the wavelength of the resonant acoustic modes is comparable with, or smaller than, the cavity dimensions, these modes...

...Frantisek L. Eisinger; Robert E. Sullivan Acoustic resonance or acoustic vibration, which develops in flow channels containing a tube bank, is caused by vortex shedding generated by crossflow over the tube bank. Transverse acoustic modes are excited, which are perpendicular to the direction of flow...

...Samir Ziada The excitation mechanism of acoustic resonances has long been recognized, but the industry continues to be plagued by its undesirable consequences; manifested in severe vibration and noise problems in a wide range of industrial applications. This paper focuses on the nature...

... at its inlets. The shear layer separating from this step expansion is found to excite intense acoustic resonances over multiple ranges of flow velocity. The excited acoustic mode is confined to the branch pipes and has an acoustic pressure node at the centerline of the T -junction. The length...

...A. Mohany; S. Ziada A numerical simulation of the flow-excited acoustic resonance for the case of two-tandem cylinders in cross-flow is performed. The spacing ratio between the cylinders ( L / D = 2.5 ) is inside the proximity interference region. Similar simulation is performed for the case...

...A. Mohany; S. Ziada A parametric study has been performed to investigate the effect of cylinder diameter on the acoustic resonance mechanism of two tandem cylinders exposed to cross-flow in a duct. Three spacing ratios corresponding to different flow regimes inside the “proximity interference...

...John Mahon; Craig Meskell The interaction between acoustic resonance and damping controlled fluidelastic instability (FEI) in a normal triangular tube array ( P ∕ d = 1.32 ) has been investigated. The duct acoustics were excited with speakers placed adjacent to the tube array to artificially...

...Frantisek L. Eisinger; Robert E. Sullivan Strong acoustic resonance with acoustic pressures reaching up to 165 dB developed in the boiler bank of a package boiler at full load. At first, the resonance developed at a lower frequency in the downstream portion of the tube bank and was suppressed...

... in case (c), which exhibits the strongest acoustic resonance. The mode shape shown above the branch pipes in each diagram corresponds to the primary acoustic mode of the branches , f p 1 . This is the mode that was expected to be most relevant to the flow-acoustic coupling in the T-junction...

...P. A. Feenstra; D. S. Weaver; Frantisek L. Eisinger Experimental laboratory research was performed to study the effect of test section width on the magnitude of acoustic resonance generated in a small pitch ratio staggered tube bank. Three different test section widths were studied: 505 mm , 714 mm...

... . Manuscript received by the PVP Division, February 1, 2000; revised manuscript received April 12, 2000. Technical Editor: S. Y. Zamrik. 01 February 2000 12 April 2000 power plants vibrations flow failure (mechanical) acoustic resonance turbulence Traditionally, power...

... to eliminate the noise source in one such valve. Over 300 tests were conducted on 25 different valve configurations. Testing of the original valve configuration indicated that the noise was caused by vortex shedding over the valve seat cavity coupled with an acoustic resonance across the throat of the valve...