Onset of separation in film cooling following a slot
Abstract
The rate of mass injection which could initiate boundary layer separation is studied. Numerical calculation of flow parameters indicate, depending on upstream and over the slot behavior of the flow, a separated bubble may form downstream from the slot. Within this separated bubble, film cooling effectiveness reduces and heat transfer coefficient rapidly increases. The numerical results for incompressible turbulent flow are compared with selected experimental film cooling data. The behavior of film cooling data, in regard to separation, depends not only on injection parameter, M, but also on upstream and mainstream flow behavior.
- Publication:
-
American Society of Mechanical Engineers
- Pub Date:
- November 1975
- Bibcode:
- 1975asme.meetQ....H
- Keywords:
-
- Boundary Layer Separation;
- Film Cooling;
- Heat Transfer Coefficients;
- Mass Flow Rate;
- Performance Prediction;
- Secondary Injection;
- Boundary Layer Control;
- Bubbles;
- Incompressible Flow;
- Pressure Gradients;
- Shear Stress;
- Slots;
- Turbulent Flow;
- Fluid Mechanics and Heat Transfer