Investigation of density gradient fluctuations in a turbulent jet by means of the laser Schlieren crossed-beam method
Abstract
Density gradient fluctuations within a round, turbulent jet were investigated at Mach numbers of 0.62 and 0.95 by laser Schlieren photography. Cross spectral density, coherence function, and phase velocity of the density gradient fluctuations were obtained using an arrangement of two crossed laser beams at various distances from the nozzle. Information on coherent structures in a jet was obtained, even at high Mach numbers.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- October 1985
- Bibcode:
- 1985STIN...8631849K
- Keywords:
-
- Density Distribution;
- Free Jets;
- Schlieren Photography;
- Turbulent Jets;
- Flow Velocity;
- Nozzle Flow;
- Phase Coherence;
- Phase Velocity;
- Fluid Mechanics and Heat Transfer