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Investigation of cars and laser-induced saturated fluorescence for practical combustion diagnosis. Final report Aug 78-Aug 79

Technical Report ·
OSTI ID:6609644
; ;
The report gives results of experimental investigations aimed at developing nonperturbing, spatially precise, in-situ diagnostic techniques to measure species composition and temperature in flames. The investigations continued earlier development of coherent anti-Stokes Raman spectroscopy (CARS) and laser-induced saturated fluorescence. The program included two main, concurrent tasks. In Task 1, optical thermometry, the practical feasibility of CARS was demonstrated in a program of research-scale combustor testing (results agreed to within 5% for combustion zone temperature measurements made with CARS and with shielded thermocouples). In Task 2, optical composition, laser-induced saturated fluorescence was examined in regard to its capability for measuring CH, CN, and NO concentrations in flames. Saturation of the fluorescence in CH and CN was achieved and considerable insight into the physics of saturated fluorescence was obtained. Promising initial results of NO fluorescence in flames are described, but saturation was not observed for laser spectral intensities up to 6 million W/sq cm/cm.
Research Organization:
United Technologies Research Center, East Hartford, CT (USA)
OSTI ID:
6609644
Report Number(s):
PB-80-190515
Country of Publication:
United States
Language:
English

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800 -- Combustion
Pyrolysis
& High-Temperature Chemistry
42 ENGINEERING
424000* -- Engineering-- Pollution Control Equipment-- (1980-1989)
AIR POLLUTION
CHALCOGENIDES
COMBUSTION PRODUCTS
COMBUSTORS
CYANIDES
DIAGNOSTIC TECHNIQUES
FLAMES
FLUORESCENCE
GAS ANALYSIS
INDUSTRIAL WASTES
LASER SPECTROSCOPY
LUMINESCENCE
MEASURING INSTRUMENTS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
POLLUTION
RAMAN EFFECT
SPECTROSCOPY
TEMPERATURE MEASUREMENT
TRACE AMOUNTS
WASTES