LDV measurements near a vortex shedding strut mounted in a pipe
Abstract
The velocity field around a vortex shedding strut mounted in a circular pipe has been measured in detail with a laser Doppler velocimeter (LDV) at a pipe Reynolds number equal to 90,000. The instantaneous velocity is decomposed into mean, periodic, and random components. Only the first two harmonics are large enough to be detected; the largescale structure can be characterized by just these two terms and the mean. Profiles of the different velocity terms are given upstream of, downstream of, and close to the strut. The twodimensional velocity vector field of the mean flow on the transverse diametral plane of symmetry is presented along with its streamlines. Finally, profiles of the ratio of the energy of a periodic component to the total kinetic energy in a narrow frequency band are given.
 Publication:

IN: Engineering applications of laser velocimetry; Proceedings of the Symposium
 Pub Date:
 1982
 Bibcode:
 1982ealv.proc..193Y
 Keywords:

 Laser Doppler Velocimeters;
 Pipe Flow;
 Struts;
 Velocity Measurement;
 Vortex Shedding;
 Circular Tubes;
 Flow Velocity;
 Reynolds Number;
 Upstream;
 Velocity Distribution;
 Fluid Mechanics and Heat Transfer