Asymptotic velocity defect profile in an incipient-separating axisymmetric flow
Abstract
A new asymptotic mean velocity profile is found to be concomitant with appreciable incipient separation and extremely high-turbulence intensities in the final stages of an 8-deg total divergence angle conical diffuser. The comparison with the other asymptotic velocity defect profiles in Perry-Schofield coordinates showed the distinctly different shape of the present asymptotic profile. The two Reynolds numbers confirmed this asymptotic mean velocity profile. Application of rapid distortion theory indicated coexistence of the regions of slowly and rapidly changing turbulences in the conical diffuser. Results are found to support well the theory that turbulence is not universal and depends on the initial and boundary conditions.
- Publication:
-
AIAA Journal
- Pub Date:
- January 1995
- DOI:
- 10.2514/3.12337
- Bibcode:
- 1995AIAAJ..33...94S
- Keywords:
-
- Axisymmetric Flow;
- Conical Nozzles;
- Divergent Nozzles;
- Nozzle Flow;
- Separated Flow;
- Turbulence;
- Velocity Distribution;
- Asymptotic Properties;
- Boundary Conditions;
- Flow Distortion;
- Pipe Flow;
- Reynolds Number;
- Turbulent Flow;
- Fluid Mechanics and Heat Transfer