Pressure Recovery of Collectors with Annular Curved Diffusers
Abstract
Pressure recovery is examined for axisymmetric annular curved diffusers with various values of inlet/exit area ratio. The conditions of inlet flow include three swirl angles and two values of boundary layer blockage. Then, one of the diffusers is connected to two types of collectors with different sizes. The discharge pressure is decreased by the collector. The cause is not deterioration of diffuser performance due to asymmetric pressure distribution but formation of a corkscrew type vortex flow inside the collector. An attempt to retard the vortex motion was successful by inserting obstructions in the collector. If a large size collector is used together with proper obstructions inside the collector, pressure-rise is possible in the collector rather than pressure drop.
- Publication:
-
International Journal of Turbo and Jet Engines
- Pub Date:
- December 1987
- DOI:
- 10.1515/TJJ.1987.4.3-4.181
- Bibcode:
- 1987IJTJE...4..181S
- Keywords:
-
- Diffusers;
- Gas Turbines;
- Pressure Recovery;
- Curvature;
- Inlet Flow;
- Pressure Distribution;
- Secondary Flow;
- Vortices;
- Fluid Mechanics and Heat Transfer