Two-component simultaneous LDV (Laser Doppler Velocimeter) turbulence measurements in an axisymmetric nozzle afterbody subsonic flow field with a cold, underexpanded supersonic jet
Abstract
A test was conducted to obtain nonintrusive measurements in the flow field about an axisymmetric nozzle afterbody with a cold, underexpanded jet, M sub j = 1.563, in a parallel free stream, M sub alpha = 0.6. Reynolds shear stress and two components of mean velocity and turbulence intensity were measured using a two-color Bragg-diffracted laser Doppler velocimeter. Additional experimental data include the afterbody surface pressure distribution and laser vapor screen flow visualization of the jet plume. A multiple seeding technique was used to investigate the bimodal velocity probability distributions observed in the jet mixing region.
- Publication:
-
Final Report
- Pub Date:
- June 1983
- Bibcode:
- 1983cals.rept.....H
- Keywords:
-
- Afterbodies;
- Axisymmetric Flow;
- Flow Velocity;
- Jet Mixing Flow;
- Nozzle Flow;
- Laser Doppler Velocimeters;
- Supersonic Flow;
- Velocity Measurement;
- Fluid Mechanics and Heat Transfer