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International Journal of Energetic Materials and Chemical Propulsion
ESCI SJR: 0.149 SNIP: 0.16 CiteScore™: 0.29

ISSN Imprimer: 2150-766X
ISSN En ligne: 2150-7678

International Journal of Energetic Materials and Chemical Propulsion

DOI: 10.1615/IntJEnergeticMaterialsChemProp.v3.i1-6.190
pages 179-187

TURBULENT FLAME CONCENTRATION AND TEMPERATURE MEASUREMENTS WITH NARROWBAND EXCIMER LASER USING 308 nm

F. Lipp
TH Darmstadt FG 1613, Petersenstr. 30, D-64287 Darmstadt, Germany
Egon P. Hassel
Institute for Technical Thermodynamics Faculty of Mechanical Engineering and Marine Technology University of Rostock Albert-Einstein-Str. 2, D-18059 Rostock, Germany
Johannes Janicka
Institute of Energy and Power Plant Technology, TU Darmstadt, Jovanka-Bontschits-Strasse 2, 64287 Darmstadt, Germany; Darmstadt Graduate School of Excellence Energy Science and Engineering, TU Darmstadt, Jovanka-Bontschits-Strasse 2, 64287 Darmstadt, Germany

RÉSUMÉ

Space and time-resolved measurements of O2, N2, H2O and H2 concentration and temperature have been made using the spontaneous Raman scattering technique in a turbulent H2/N2 diffusion flame. The Raman apparatus consists of a narrowband XeCl excimer laser working at 308 nm, and an intensified multichannel array camera which gives full information about all major species and spectral background simultaneously. The appearance of fluorescence background from OH radicals in the flame reaction zones is taken into account by a background fitting routine. This paper presents new experimental results containing concentrations, temperatures, mixture fractions f, f-plots and rms amplitude of f in comparison to numerical predicted results obtained with a Reynolds stress flame model. The results show that interpretation of pulsed Raman data can be strongly improved by using an array detector with 700 channels and a full spectral fit routine based on a temperature-dependent spectra library of all major species and the OH LIF background.


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