An experimental study was carried out to investigate fluidelastic instability in finned tube bundles in normal and parallel triangular arrays. Three arrays of each geometry type were studied experimentally: two arrays with serrated, helically wound finned tubes of different fin densities, and a bare tube array with the same base diameter as the finned tubes. All six tube arrays studied had the same tube pitch. The finned tubes under consideration were commercial finned tubes typically used in the fossil and process industries. For the purpose of the present investigation, the concept of “effective diameter” of a finned tube, as previously used to predict vortex shedding, was used to compare the finned tube results with other finned tube results as well as the existing bare tube world data. The experimental results for the triangular arrays show that the fin’s structure strongly influences the fluidelastic stability of finned tube bundles and the fin pitch is demonstrated to reduce the difference in the stability threshold between the tube array geometries as the fin density increases. Overall, the effect of serrated fins on fluidelastic instability is very complex and array geometry dependent, stabilizing some arrays and destabilizing others. Clearly, the effect of fins cannot be accounted for by the simple use of an effective diameter of an equivalent bare tube. An earlier version of this paper appeared at the ASME 2010 FSI Conference, FEDSM-ICNMM2010-30223.
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e-mail: wangj73@mcmaster.ca
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April 2012
Research Papers
Fluidelastic Instability in Normal and Parallel Triangular Arrays of Finned Tubes
J. Wang,
J. Wang
Department of Mechanical Engineering,
e-mail: wangj73@mcmaster.ca
McMaster University
, Hamilton, ON, L8S4L7, Canada
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D. S. Weaver
D. S. Weaver
Department of Mechanical Engineering,
e-mail: weaverds@mcmaster.ca
McMaster University
, Hamilton, ON, L8S4L7, Canada
Search for other works by this author on:
J. Wang
Department of Mechanical Engineering,
McMaster University
, Hamilton, ON, L8S4L7, Canada
e-mail: wangj73@mcmaster.ca
D. S. Weaver
Department of Mechanical Engineering,
McMaster University
, Hamilton, ON, L8S4L7, Canada
e-mail: weaverds@mcmaster.ca
J. Pressure Vessel Technol. Apr 2012, 134(2): 021302 (7 pages)
Published Online: January 25, 2012
Article history
Received:
December 13, 2010
Revised:
April 13, 2011
Online:
January 25, 2012
Published:
January 25, 2012
Citation
Wang, J., and Weaver, D. S. (January 25, 2012). "Fluidelastic Instability in Normal and Parallel Triangular Arrays of Finned Tubes." ASME. J. Pressure Vessel Technol. April 2012; 134(2): 021302. https://doi.org/10.1115/1.4004621
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