Accession Number:

ADA409179

Title:

Assessment of Multiple Scattering Errors of Laser Diffraction Instruments

Descriptive Note:

Abstract

Corporate Author:

AIR FORCE RESEARCH LAB EDWARDS AFB CA PROPULSION DIRECTORATE WEST

Personal Author(s):

Report Date:

2002-11-06

Pagination or Media Count:

4.0

Abstract:

Characterization of high-pressure rocket injector sprays often involves using commercial laser-based diagnostic instruments to measure droplet size in an environment well beyond the intended range of the instruments. Even in cold-flow measurements, this environment often involves very large number densities of droplets N 10 exp 4cc as well as refractive index gradients in the surrounding gas. As a result, optical attenuation and multiple scattering of the probe beams and scattering signal is often the limiting factor in the ability to extract useable data.

Subject Categories:

  • Optics
  • Liquid Propellant Rocket Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE