Combustion applications of laser-induced breakdown spectrosocpy

Conference · Mon Mar 01 00:00:00 EST 1982

OSTI ID:5396966

Schmieder, R W

A series of experiments at Sandia Laboratories has demonstrated the utility of spectroscopic analysis of the emission from laser-produced sparks as a new and potentially powerful diagnostic for combustion. The technique has high space-time resolution and generates intense emission easily detectable over background luminescence. The spectra give relative atomic abundances (independent of molecular state) and therefore describe a conserved scalar quantity which is useful for modelling. The process of spectral analysis is simply interpolation between known standards, obviating the need for absolute emission spectroscopic measurement. Experiments on gas mixtures, jets, flames, and fuel vapors have explored various aspects and limitations of the technique for these systems. The Sandia work has concentrated on using time-integrated emission from sparks produced by a CO/sub 2/ TEA laser using high spectral resolution for determining abundances of major species (H, C, N, O), but extension of the technique to time-resolved spectra and minor species is indicated.

• Research Organization: Sandia National Labs., Livermore, CA (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5396966
• Report Number(s): SAND-81-8886; CONF-811164-3; ON: DE82009844
• Resource Relation: Conference: Electro-optics/laser conference, Anaheim, CA, USA, 17 Nov 1981
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
42 ENGINEERING
COMBUSTION
PLASMA DIAGNOSTICS
COMBUSTION PRODUCTS
LASER SPECTROSCOPY
BREAKDOWN
CARBON
CARBON DIOXIDE LASERS
COMBUSTION KINETICS
ELECTRIC SPARKS
FLAMES
FUEL-AIR RATIO
HYDROGEN
JETS
NITROGEN
OXYGEN
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
ELECTRIC DISCHARGES
ELEMENTS
GAS LASERS
KINETICS
LASERS
NONMETALS
OXIDATION
REACTION KINETICS
SPECTROSCOPY
THERMOCHEMICAL PROCESSES
400800* - Combustion
Pyrolysis
& High-Temperature Chemistry
420300 - Engineering- Lasers- (-1989)