On acoustical resonance in tube arrays part II: Damping criteria

An in-Depth Study of Vortex Shedding, Acoustic Resonance and Turbulent Forces in Normal Triangle Tube Arrays

“…This behaviour is attributed to the low-energy level of vortex excitation in comparison with sound attenuation in the system [see for Example, Fitzpatrick (1985), Ziada et al (1989b), Blevins & Bressler (1992), Eisinger et al (1992Eisinger et al ( , 1994]. No resonance resulting from the component f T is observed in this case; verifying that this component in small spacing bundles is rather weak to excite acoustic resonances.…”

Vorticity shedding and acoustic resonance in tube bundles

“…The lower modes, however, may not be excited because the frequency coincidence occurs at low dynamic heads where the vorticity shedding excitation may still be weak in comparison to the system acoustic damping. Several acoustic damping criteria have been developed by Chen (1968), Fitzpatrick (1986), Ziada et at. (1989b), Blevins & Bressler (1992) and Eisinger et at.…”

“…The critical flow velocity for acoustic resonances may be obtained from V cr = f a L / S a . If V cr is found to be less than the maximum flow velocity, the acoustic resonance frequency f a should be increased by installing antiresonance baffle plates (Ziada et al, 1989b).…”

Acoustic resonance and pressure drop through a staggered tube bundle in a compact heat exchanger

“…To predict and avoid the acoustic resonance, Fitz-Hugh [19] and Chen [20] summarised the previous experimental data and proposed Strouhal charts for in-line and staggered array, and Ziada et al [21] suggested damping criteria by parametric studies for various tube arrays. Acoustic resonance is readily produced in a heat exchanger containing small diameter tubes, and the intense acoustic pressure caused by this acoustic resonance can affect the pressure drop which is one of key design parameters in development of heat exchange equipment.…”