Particle dispersion in turbulent sprays
Abstract
Measurements of droplet dispersion and vaporization rates are carried out and compared with computational predictions. Droplet dispersion, mean axial velocity, and the axial autocorrelation function of the droplets are measured using a laser sheet technique. The experimental facility is modified to accommodate a true spray using an ultrasonic atomizer and droplets injected with a fluorescent dye. The computational part of the project is the development of a Large Eddy Simulation (LES) method for the turbulent jet. A LES-model for the unresolved scales of the flow is implemented into the Navier-Stokes solver. The results for filtered and unfiltered variables are compared to the experiments and improvement of the particle statistics due to the LES-model is found.
- Publication:
-
Annual Report
- Pub Date:
- April 1993
- Bibcode:
- 1993ucd..rept.....K
- Keywords:
-
- Autocorrelation;
- Axial Flow;
- Drops (Liquids);
- Sprayers;
- Turbulence;
- Turbulent Flow;
- Turbulent Jets;
- Vortices;
- Atomizers;
- Computerized Simulation;
- Dyes;
- Laser Induced Fluorescence;
- Navier-Stokes Equation;
- Fluid Mechanics and Heat Transfer