Appicability of Laser Raman Scattering Diagnostic Techniques to Practical Combustion Systems.
Abstract
Laser Raman scattering techniques for combustion diagnosis have undergone considerable development in the past several years and are now being employed in a number of fundamental flame investigations. However, from an instrumentation viewpoint, practical combustion environments can differ greatly from the flames typically employed in fundamental studies. In particular, pulsed laser Raman thermometry experiments have shown laser modulated particulate (soot) incandescence to be an especially severe problem. Particles in the measurement volume, which, at flame temperatures, are already incandescent and contribute significantly to the total luminous emission, absorb the incident Raman inducing laser radiation, heat to temperatures far above ambient, and emit greatly increased amounts of gray/blackbody radiation which can exceed the sought-for Raman signal levels by several orders of magnitude. Under Project SQUID sponsorship, a detailed study of this phenomenon has been conducted, the results of which are reported herein.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1976
- Accession Number
- ADA032492
Entities
People
- Alan C. Eckbreth
Organizations
- Purdue University