Characteristics of wake turbulence due to free stream turbulence environment
Abstract
This paper presents results of an experimental study of the turbulence characteristics of a plane wake in the presence of free stream turbulence. The increase in the magnitude of turbulence intensities and Reynolds stress of the wake are reported for an increase in free stream turbulence levels of 0.4, 5.23 and 7.23 percent. Parameters describing the effect of free stream turbulence on the turbulence velocity and scale length are discussed. Correlations are developed to predict the decay behavior of turbulence quantities, dependent upon the trailing edge conditions, free stream turbulence level, drag coefficient and distance downstream of the trailing edge. A self-preservation parameter has also been obtained to examine the effect of free stream turbulence on self-preservation of the wake. The results are applicable to acoustics, wing design and multi-stage turbomachinery.
- Publication:
-
16th Joint Propulsion Conference
- Pub Date:
- June 1980
- Bibcode:
- 1980jphc.conf.....P
- Keywords:
-
- Aeroacoustics;
- Free Flow;
- Turbomachinery;
- Turbulent Wakes;
- Wing Oscillations;
- Aerodynamic Drag;
- Boundary Layer Flow;
- Reynolds Stress;
- Scale Effect;
- Steam Turbines;
- Turbulent Flow;
- Turbulent Heat Transfer;
- Wing Profiles;
- Fluid Mechanics and Heat Transfer