Hostname: page-component-78c5997874-v9fdk Total loading time: 0 Render date: 2024-11-03T23:21:03.331Z Has data issue: false hasContentIssue false
  • English
  • Français

Some experimental aspects of the flow induced vibration of a cantilever mounted across two streams of air at right angles

Published online by Cambridge University Press:  04 July 2016

B. A Jubran
B. A Jubran*
Affiliation:
Department of Mechanical Engineering University of Jordan Amman
Get access Rights & Permissions [Opens in a new window]

Abstract

Some of the experimental features of the dynamic response of a cantilever subjected to two streams of air at right angles to each other are reported. The cantilever is mounted across a mainstream flow while subjected to another jet injected parallel to the test cylinder.

The dimensionless vibration displacement amplitude was measured in the transverse direction (lift force direction) as well as in the streamwise direction (drag force direction) while varying the secondary jet flow velocity. It was found that in the vicinity of the cylinder a secondary jet can be used to reduce the dimensionless transverse vibration displacement amplitude in the lock-in region and increase it outside the lock-in region. The effect of jet injection on the streamwise direction vibration is to increase it for all reduced velocities considered.

Type
Research Article
Information
The Aeronautical Journal , Volume 96 , Issue 956 , July 1992 , pp. 240 - 242
Copyright
Copyright © Royal Aeronautical Society 1992 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Blevins, R. D. Flow induced vibration, New York, Van Nostran, 1977.Google Scholar
2. Chen, S.S. Flow-induced vibration of circular cylindrical structures, Hemisphere Publishing, 1987.Google Scholar
3. Parkinson, G. Phenomena and modelling of flow-induced vibration of bluff bodies, Prog Aerosp Sci, 1989, 26, pp 169–244.Google Scholar
4. Iwan, W. D. The vortex induced oscillations of elastic structural elements, Trans ASME J Eng Ind, 1975, pp 1378–1382.Google Scholar
5. Feng, C.C. The measurements of vortex induced effects in flow past stationary and oscillating circular cylinders and D-section cylinder, Msc. Thesis, University of British Colombia, 1968.Google Scholar
6. Kwoke, K. C. S. and Melbourne, W. H. Cross-wind response of structure due to displacement dependent lock-in excitation, Proceedings of the Fifth International Conference on Wind Engineering, Fort Collins, Colorado, U.S.A, Vol. 2, pp 699–708,1979.Google Scholar
7. Jubran, B. A. and Hamdan, M. N. Effects of secondary injection on the cross flow induced vibration of a single cylinder, J King Saud Univ, Eng Sci, 1991, 3, (2), pp 1411.Google Scholar
8. Jubran, B. A., Hamdan, M. N. and Hijawi, M. A. Dynamic response of the flow induced vibration of smooth and rough single cantilever circular cylinders, Submitted for publication, 1991.Google Scholar
9. Graham, J. M. R. The effect of end plates on the two dimensionality of a vortex wake, Aeronaut Q, 1969, pp 237–247.Google Scholar
10. Kline, S. J. and Mcclintock, F. A. Describing uncertainties in single sample experiments, Mech Eng, 1953, pp 3–8.Google Scholar
11. Nakagawa, T. A formation mechanism of altering vortices behind acircular cylinder at high Reynolds numbers, J Wind Eng Ind Aerodynam, 1986, 25, pp 113–129.Google Scholar