Compressible turbulent flows in long circular cross-section diffusers of large area ratio
Abstract
A computational method based on the boundary-layer concept is proposed for calculating compressible, turbulent flows in circular cross-section diffusers. The present work overcomes the limitations of older methods. Its effectiveness in predicting diffuser flows is mainly due to the application of the Cebeci-Smith turbulence model in conjunction with the use of the Coles velocity profiles. The influence of the basic flow parameters on flow separation is discussed. An extensive comparison with experiment is presented; this includes pressure distributions, boundary-layer properties, velocity profiles in different cross sections and, in the case of a recent experiment, turbulent shear stresses.
- Publication:
-
Zeitschrift fur Flugwissenschaften und Weltraumforschung
- Pub Date:
- June 1985
- Bibcode:
- 1985ZFlWe...9..143S
- Keywords:
-
- Boundary Layer Equations;
- Compressible Flow;
- Diffusers;
- Turbulent Flow;
- Compressibility;
- Computational Fluid Dynamics;
- Cross Sections;
- Pressure Distribution;
- Shear Stress;
- Turbulence Models;
- Velocity Distribution;
- Fluid Mechanics and Heat Transfer