FLOW PAST V-GROOVE CIRCULAR CYLINDERS.

Abstract

Measurements of the mean pressure distributions and Strouhal numbers on six V-groove circular cylinders and a smooth circular cylinder were made over a Reynolds number range of 2 multiplied by 10**4 to 1. 6 multiplied by 10**5. Spectra of the velocity fluctuations downstream of the cylinders were also measured. The transition from subcritical to critical and from critical to supercritical flow regimes occur at lower Reynolds numbers for the V-groove cylinder than for the smooth cylinder. However, when the Reynolds number is based upon an equivalent diameter, which represents the total surface area of the cylinder, it is found that the Reynolds number trends are very nearly the same for V-groove and smooth cylinders.