Experimental research on secondary flows in annular turbine cascades at the Von Karman Institute
Abstract
Investigations of secondary flows in isolated annular cascades with collateral inlet boundary layers; in an annular turbine nozzle guide vane followed by a rotating blade row; in isolated annular cascades with skewed inlet boundary layers; and in a turbine stator preceded by a full stage are summarized. Secondary flow patterns in annular configurations, e.g., the mutual interference of the passage vortices and the radial pressure gradient, the radial migration of low momentum material, effects of tip contouring inlet skew are studied. Differences between the flow field in annular and straight cascades can be derived from comparison with other test results.
- Publication:
-
In its Secondary Flows and Endwall Boundary Layers in Axial Turbomachines 79 p (SEE N84-29162 19-34
- Pub Date:
- 1984
- Bibcode:
- 1984sfeb.nasa.....B
- Keywords:
-
- Annular Flow;
- Annuli;
- Axial Flow Turbines;
- Cascade Flow;
- Secondary Flow;
- Boundary Layer Flow;
- Flow Distribution;
- Stators;
- Vortices;
- Fluid Mechanics and Heat Transfer