A pseudo three-dimensional analysis of flows in vaneless diffusers for mixed-flow compressors
Abstract
A solution is given of the equations of motion for inviscid flow with axial symmetry in mixed-flow diffusers of any given geometry. The associated computer programmes have been applied, together with similar programmes for the impeller based on streamline-normal solutions, to predict streamline, velocity and pressure distributions in a variety of vaneless diffusers as follows: (1) radial-flow impeller with radial diffuser; (2) mixed-flow impeller with pure conical diffuser; and (3) mixed-flow impeller with curved diffusers. The first of these is shown to give essentially stable flow, the second extremely unstable flow and the third conditionally stable flow provided that a suitable combination of initial contraction and hub/shroud profile is adopted.
- Publication:
-
Journal of Mechanical and Engineering Science
- Pub Date:
- December 1975
- Bibcode:
- 1975JMecE..17..348W
- Keywords:
-
- Centrifugal Compressors;
- Engine Design;
- Multiphase Flow;
- Three Dimensional Flow;
- Turbocompressors;
- Vaneless Diffusers;
- Conical Flow;
- Gas Turbine Engines;
- Impellers;
- Inviscid Flow;
- Mixers;
- Radial Flow;
- Superchargers;
- Fluid Mechanics and Heat Transfer