Light scattering technique for determining droplet size distributions in two-phase liquid-dominated nozzle jets
A method for determining the droplet size distribution from measurements of the scattered light intensity in the forward scattering lobe was developed for two-phase, single-component, liquid-dominated nozzle jet flows containing small droplets (dia < 10 ..mu..m for visible light wavelengths). The technique is based upon matching the measured scattered light intensity profile with a summation of the intensity contributions of a series of appropriately spaced narrow band size distributions. A numerical optimization technique is used to determine the strengths of the individual bands which yields the best agreement with the measured scattered light intensity profile. The narrow band intensity contributions are calculated using Mie scattering theory which is accurate for small multiparticle light scattering. Application of the technique to the determination of the droplet size distribution (Sauter mean dia near 1.8 ..mu..m) in a low quality steam-water nozzle jet is described. The purpose of the research is to be able to evaluate particular nozzle designs.
- Research Organization:
- California Univ., Livermore (USA). Lawrence Livermore Lab.
- OSTI ID:
- 6876501
- Report Number(s):
- UCRL-79647; CONF-780820-2
- Country of Publication:
- United States
- Language:
- English
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DISTRIBUTION
DROPLETS
EVALUATION
FLUID FLOW
Geothermal Legacy
HYDROGEN COMPOUNDS
JETS
LIGHT SCATTERING
NOZZLES
OXYGEN COMPOUNDS
PARTICLE SIZE
PARTICLES
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STEAM
TOTAL FLOW SYSTEMS
TWO-PHASE FLOW
WATER