Strouhal number of two cylinders of different diameter arranged in tandem
Abstract
The Strouhal number of two cylinders arranged in tandem, where the diameter of one is twice that of the other, was experimentally determined. The two cases where (1) the larger cylinder is upstream of the smaller, and (2) the smaller one is upstream of the larger one, were both investigated. It was shown that the Strouhal numbers of both cylinders change very little with Reynolds number and that any change can be neglected in the measuring interval. However, the Strouhal numbers do change with proportional pitch up to proportional pitch values of 4 to 5. At longer pitches the Strouhal numbers of both cylinders remain practically constant and approximately equal to the Strouhal numbers of the cylinders themselves.
 Publication:

Acta Technica
 Pub Date:
 1975
 Bibcode:
 1975AcTec..20..366N
 Keywords:

 Cylindrical Bodies;
 Flow Velocity;
 Strouhal Number;
 Vortex Sheets;
 Circular Cylinders;
 Diameters;
 Flow Measurement;
 Reynolds Number;
 Velocity Distribution;
 Fluid Mechanics and Heat Transfer