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The Effect of Flow Pulsations on the Streamwise Vibration of a Cantilevered Rigid Cylinder

[+] Author Affiliations
Efstathios Konstantinidis, Dimitris Giagopoulos

University of Western Macedonia, Kozani, Greece

Joseph Sherwood, Stavroula Balabani

King’s College London, London, UK

Paper No. FEDSM-ICNMM2010-30227, pp. 65-73; 9 pages
  • ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels
  • ASME 2010 7th International Symposium on Fluid-Structure Interactions, Flow-Sound Interactions, and Flow-Induced Vibration and Noise: Volume 3, Parts A and B
  • Montreal, Quebec, Canada, August 1–5, 2010
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 978-0-7918-5451-8 | eISBN: 978-0-7918-3880-8
  • Copyright © 2010 by ASME


The effect of pulsations superimposed on a mean incident flow on the streamwise vibration of an elastically-supported cantilevered rigid cylinder with two coupled translational and rotational degrees of freedom was investigated experimentally. The pulsation frequency was varied between 7.8–19.2 Hz corresponding to 1.2–3.0 times the vortex shedding frequency from a fixed cylinder in steady flow whereas the amplitude of the pulsations and the incident-flow mean velocity were held constant, the latter corresponding to a Reynolds number of 2160. The results show that there are two excitation regions in which the amplitude of vibration increases up to 400% compared to that in steady flow at the same Reynolds number. As the pulsation frequency is further increased in each range, the amplitude of the vibrations drops almost linearly down to a level near that without flow pulsations although the frequency of vibration remains locked-on at the imposed pulsation frequency in all cases.

Copyright © 2010 by ASME



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