Laser-induced fluorescence determination of temperatures in low pressure flames

Journal Article · Fri Sep 01 00:00:00 EDT 1989 · Applied Optics; (USA)

DOI:https://doi.org/10.1364/AO.28.003556· OSTI ID:5573130

Rensberger, K J; Jeffries, J B; Copeland, R A; Kohse-Houinghaus, K; Wise, M L; Crosley, D R ^[1]

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1. SRI International, 333 Ravenswood Avenue, Menlo Park, California 94025 (US)

Spatially resolved temperatures in a variety of low pressure flames of hydrogen and hydrocarbons burning with oxygen and nitrous oxide are determined from OH, NH, CH, and CN laser-induced fluorescence rotational excitation spectra. Systematic errors arising from spectral bias, time delay, and temporal sampling gate of the fluorescence detector are considered. In addition, we evaluate the errors arising from the influences of the optical depth and the rotational level dependence of the fluorescence quantum yield for each radical. These systematic errors cannot be determined through goodness-of-fit criteria and they are much larger than the statistical precision of the measurement. The severity of these problems is different for each radical; careful attention to the experimental design details for each species is necessary to obtain accurate LIF temperature measurements.

• OSTI ID: 5573130
• Journal Information: Applied Optics; (USA), Vol. 28:17; ISSN 0003-6935
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
COMBUSTION
DIAGNOSTIC TECHNIQUES
FLAMES
TEMPERATURE MEASUREMENT
HYDROCARBONS
HYDROGEN
CHEMICAL REACTION YIELD
EXCITATION
FLUORESCENCE SPECTROSCOPY
HYDROXYL RADICALS
LASER RADIATION
METHYLENE RADICALS
NITROGEN HYDRIDES
NITROUS OXIDE
OSCILLATOR STRENGTHS
OXYGEN
REACTION INTERMEDIATES
ROTATIONAL STATES
CHALCOGENIDES
CHEMICAL REACTIONS
ELECTROMAGNETIC RADIATION
ELEMENTS
EMISSION SPECTROSCOPY
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
HYDRIDES
HYDROGEN COMPOUNDS
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
RADIATIONS
RADICALS
SPECTROSCOPY
THERMOCHEMICAL PROCESSES
YIELDS
400800* - Combustion
Pyrolysis
& High-Temperature Chemistry