Statistical characteristics of the turbulent wake behind an intersecting cruciform circular cylinder
Abstract
In order to clarify the periodic structure in the near field and the turbulent eddy structure in the far field of the intersecting cruciform circular cylinder wake, the detailed measurements have been performed on the statistical characteristics such as onepoint and twopoint time correlations, power spectra, triple velocity correlations and probability density profiles. The experimental results are summarized as follows: The quasiperiodicity of the fluctuating velocity appears to different degrees at the different locations in the cross section of the near wake field, and isn't found at the wake center. The turbulent large eddy structure conjectured from the contours of the spacetime correlation is markedly different at each location in the cross section, and its decay rate is also slower at the center of the quasi twodimensional region than at the wake center. The magnitude of triple velocity correlation profiles on the bisector has the same order as that of the twodimensional wake, but some of the shapes are significantly different.
 Publication:

4th Symposium on Turbulent Shear Flows
 Pub Date:
 1984
 Bibcode:
 1984stsf.proc....5O
 Keywords:

 Circular Cylinders;
 Flow Geometry;
 Flow Measurement;
 Statistical Correlation;
 Turbulent Wakes;
 Far Fields;
 Near Fields;
 Power Spectra;
 Temporal Distribution;
 Vortices;
 Fluid Mechanics and Heat Transfer