Hostname: page-component-cd9895bd7-jkksz Total loading time: 0 Render date: 2024-12-26T15:59:23.083Z Has data issue: false hasContentIssue false
  • English
  • Français

On the Flutter of a Smooth Circular Cylinder in a Wake

Published online by Cambridge University Press:  07 June 2016

Alan Simpson
Alan Simpson*
Affiliation:
University of Bristol
Get access

Summary

The stability of a smooth circular cylinder, free to translate horizontally and vertically against linear springs in the wake from an identical neighbouring cylinder, is studied using quasi-static aerodynamic derivatives and simple flutter theory. It is found that at spacing values between ten and twenty cylinder diameters (typical of the spacings employed on “bundled” overhead transmission lines) classical flutter of the leeward cylinder can occur in a certain critical range of wind speeds at certain orientations of this cylinder in the wake. However, the occurrence of flutter appears to be conditional on a positive difference of natural frequency between vertical and horizontal motions of the leeward cylinder in still air.

Classical static instability (divergence) of the leeward cylinder is also shown to be possible over the entire “incidence” range in the wake, but this occurs in a much higher wind speed range than that associated with flutter.

Type
Research Article
Information
Aeronautical Quarterly , Volume 22 , Issue 1 , February 1971 , pp. 25 - 41
Copyright
Copyright © Royal Aeronautical Society. 1971

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. Simpson, A. and Lawson, T. V. Oscillations of twin power transmission lines. Proceedings of the Symposium on Wind Effects, Loughborough University, April 1968.Google Scholar
2. Counihan, J. Lift and drag measurements on stranded cables. Report 117, Imperial College, London, August 1963.Google Scholar
3. Maekawa, T. Study of wind pressure against an ACSR double conductor. Electrical Engineering in Japan, Vol. 84 (2), February 1964.Google Scholar
4. Best, M. S. and Cook, N. J. The forces on a circular cylinder in shear flow. Aero Report 103, Bristol University (Undergraduate Thesis), June 1967.Google Scholar
5. Niblett, Ll. T. A graphical representation of the binary flutter equations in normal coordinates. ARC R & M 3496, 1968.Google Scholar