The interaction between acoustic resonance and damping controlled fluidelastic instability (FEI) in a normal triangular tube array has been investigated. The duct acoustics were excited with speakers placed adjacent to the tube array to artificially replicate flow-induced acoustic resonance. The paper deals with the effect on the rms level of tube vibration of three independent parameters: imposed acoustic sound pressure level, freestream flow velocity, and structural damping. A fall in the FEI vibration amplitude with increasing sound pressure level in the tube array has been observed. In addition, the imposed acoustic field delays the onset of damping controlled fluidelastic instability. The effects of flow velocity and structural damping in conjunction with acoustic resonance on the rms of tube displacement are discussed. While the current study has clearly captured the phenomenon of interaction between the fluidelastic motion at approximately and the acoustic field at approximately , it is not apparent what the physical mechanism at work might be.
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February 2009
Research Papers
Interaction Between Acoustic Resonance and Fluidelastic Instability in a Normal Triangular Tube Array
John Mahon,
John Mahon
School of Engineering,
Trinity College
, Dublin 2, Ireland
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Craig Meskell
Craig Meskell
School of Engineering,
Trinity College
, Dublin 2, Ireland
Search for other works by this author on:
John Mahon
School of Engineering,
Trinity College
, Dublin 2, Ireland
Craig Meskell
School of Engineering,
Trinity College
, Dublin 2, IrelandJ. Pressure Vessel Technol. Feb 2009, 131(1): 011303 (7 pages)
Published Online: November 10, 2008
Article history
Received:
October 19, 2006
Revised:
August 27, 2007
Published:
November 10, 2008
Citation
Mahon, J., and Meskell, C. (November 10, 2008). "Interaction Between Acoustic Resonance and Fluidelastic Instability in a Normal Triangular Tube Array." ASME. J. Pressure Vessel Technol. February 2009; 131(1): 011303. https://doi.org/10.1115/1.3006894
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