Turbulence properties of an axisymmetric separationandreattaching flow
Abstract
The timemean and rootmeansquared values, the integral time scale, the phase velocity, and the longitudinal and circumferential length scales of the velocity and the surfacepressure fluctuations are presented for a separationandreattaching flow formed by the boundarylayer separation at the leading edge of a blunt circular cylinder at Reynolds numbers of the order of 100,000. The cross correlations of the surfacepressure fluctuations suggested that the flow in the reattachment region of the separated shear layer has a cellular structure. A phaseaveraging measurement of the reverseflow intermittency revealed an aspect of the spatial extent of the flow unsteadiness in the reattachment region.
 Publication:

AIAA Journal
 Pub Date:
 June 1991
 DOI:
 10.2514/3.10682
 Bibcode:
 1991AIAAJ..29..936K
 Keywords:

 Axisymmetric Flow;
 Boundary Layer Separation;
 Reattached Flow;
 Separated Flow;
 Turbulent Flow;
 Circular Cylinders;
 Flow Velocity;
 Leading Edges;
 Phase Velocity;
 Pressure Distribution;
 Reynolds Number;
 Fluid Mechanics and Heat Transfer