Endwall losses and flow unsteadiness in a turbine blade cascade
Abstract
An experimental investigation of the flowfield downstream of a low-speed linear cascade of turbine blades utilizing a Kiel probe transducer, hot wire, and flow visualization is presented. Flow visualization was employed to obtain detailed photographs of the flow patterns on the endwall and to exhibit the trailing edge vortices. Hot-wire anemometry together with a spectrum analyzer program was employed to determine the frequencies of the flow oscillations. It is shown that the pressure distribution on the blade with the lower turbulence intensity of the free-stream has the larger lift in the aft half of the suction side of the blade.
- Publication:
-
ASME, 35th International Gas Turbine and Aeroengine Congress and Exposition
- Pub Date:
- June 1990
- Bibcode:
- 1990gatu.confU....A
- Keywords:
-
- Blade-Vortex Interaction;
- Cascade Flow;
- Flow Distribution;
- Turbine Blades;
- Unsteady Flow;
- Flow Visualization;
- High Aspect Ratio;
- Horseshoe Vortices;
- Separated Flow;
- Trailing Edges;
- Fluid Mechanics and Heat Transfer