Laser-induced fluorescence with tunable excimer lasers as a possible method for instantaneous temperature field measurements at high pressures: checks with an atmospheric flame

Journal Article · Fri Jan 15 04:00:00 EST 1988 · Appl. Opt.; (United States)

DOI:https://doi.org/10.1364/AO.27.000365· OSTI ID:5487209

Andresen, P; Bath, A; Groger, W; Lulf, H W; Meijer, G; ter Meulen, J

A new method for instantaneous temperature field measurements based on LIF studies of OH, O/sub 2/, and H/sub 2/O in an open atmospheric flame with a tunable excimer laser is suggested. In this method the crucial problem of quenching at higher pressures is almost completely eliminated by excitation to a fast predissociating state. The various possible excitation and fluorescence processes that can be induced in the narrow tuning range of the KrF laser are characterized experimentally by excitation and dispersion spectra for the three molecules OH, O/sub 2/, and H/sub 2/O. Of particular importance is the large power of the KrF laser, which allows efficient excitation of even weak transitions. The fast predissociation of these molecules in connection with the powerful excitation laser suggests that instantaneous temperature field measurements should be possible at higher pressures.

• Research Organization: Max-Planck-Institut for Stromungsforschung, D-3400 Gottingen, Federal Republic of Germany
• OSTI ID: 5487209
• Journal Information: Appl. Opt.; (United States), Journal Name: Appl. Opt.; (United States) Vol. 27:2; ISSN APOPA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
CHEMICAL REACTIONS
COMBUSTION
DIAGNOSTIC TECHNIQUES
EMISSION SPECTROSCOPY
EXCIMER LASERS
FLAMES
FLUORESCENCE SPECTROSCOPY
GAS LASERS
HIGH PRESSURE
LASER SPECTROSCOPY
LASERS
OXIDATION
SPECTROSCOPY
TEMPERATURE MEASUREMENT
THERMOCHEMICAL PROCESSES
TUNING