Turbulent boundary layers with injection and suction through a slit. I - Mean and turbulence characteristics
Abstract
An experimental investigation of turbulent boundary layers with injection and suction through a slit is carried out in the context of applications in engineering and industries, such as slotted wing or transpiration cooling. Experiments were performed with 25 and 50-mm slits in a flat smooth plate at a constant free-stream velocity of 15 m/s. The parameters studied include the velocity profile, turbulent energy, auto-correlation function, energy spectrum, and energy balance; consideration is also given to the process of recovery from the nonequilibrium state. It is found that injection has a greater effect on the velocity profile than suction. It is also inferred that suction through a slit is a useful method of preventing flow separation.
- Publication:
-
JSME International Journal Series B
- Pub Date:
- May 1985
- Bibcode:
- 1985JSMEB..28..807S
- Keywords:
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- Fluid Injection;
- Porous Boundary Layer Control;
- Reynolds Stress;
- Slits;
- Suction;
- Turbulent Boundary Layer;
- Autocorrelation;
- Energy Spectra;
- Velocity Distribution;
- Fluid Mechanics and Heat Transfer