Time-resolved concentration measurements of jets by laser Rayleigh method - Comparison of He, CO2, and CCl2F2 jets
Abstract
The basic characteristics of mass transfer in round free jets of He, CO2, and CCl2F2 are compared through real-time concentration measurements using a laser Rayleigh scattering technique. The transition behaviors are described on the basis of time-averaged value, fluctuation intensity, and PDF. The diffusion of jet substance in fully developed turbulent flow fields is discussed: the similarity rules for the mean concentration distributions are examined and compared with the solutions for the velocity field; the results on fluctuation intensities are compared with the data of other investigators.
- Publication:
-
14th Space Technology and Science Symposium
- Pub Date:
- 1984
- Bibcode:
- 1984spte.symp..469N
- Keywords:
-
- Chlorofluoromethane;
- Fluid Jets;
- Heat Transfer;
- Laser Applications;
- Mass Transfer;
- Turbulent Diffusion;
- Gaseous Diffusion;
- Rayleigh Scattering;
- Temporal Resolution;
- Transition Flow;
- Velocity Distribution;
- Fluid Mechanics and Heat Transfer