Vortex Shedding Frequencies for a Cylinder in Confined Flow.
Abstract
Measurements are presented of vortex shedding frequencies for circular cylinders in confined flows. Experiments have been performed at Reynolds numbers up to 20,000. The range of blockage ratios covered was 0.18-0.33. Systematic changes in the shedding frequency were observed with increasing blockage, the effect being greatest at Reynolds numbers of a few thousand. Measurements of the Reynolds number for which vortex shedding just begins show that the confining walls increase the stability of the flow round the cylinder. The shedding frequency was determined using constant temperature hot wire anemometry, and also using the vibration response of a magnetometer, a method which, we feel, offers some advantages over conventional techniques. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 10, 1981
- Accession Number
- ADA102414
Entities
People
- W. A. Wilby
- W. G. Rees
Organizations
- University of Cambridge