ISSN:
1573-1987
Schlagwort(e):
concentration measurements
;
resonant holographic interferometry
;
H2/air co-flow diffusion flame
;
direct numerical simulation
;
spectral element method
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Maschinenbau
Notizen:
Abstract We apply a novel laser diagnostic technique — Resonant Holographic Interferometry (RHI) to measure the concentration of hydroxyl radical (∼2000 ppm) in a co-flow diffusion flame of diluted hydrogen and air stabilized on a Wolfhard-Parkerburner. This methodology is based upon the dispersion of light of frequency close to an electronic transition of a target molecule. The two-color setup utilized in RHI provides a two-dimensional distribution of the target species concentration and quantitative information can be obtained from the interferogram without requiring any calibration. To provide independent flame data for comparison, a two-dimensional numerical simulation was performed taking into account the effects of detailed chemical kinetics and transport phenomena. In spite of a number of simplifying assumptions made in the simulation, computational and experimental results are in good agreement with respect to the magnitude and width of the region where OH is found. We do observe a difference of approximately 1 mm in the flame position due to the simplifying assumptions made in the simulation. The comparison between the experimental and numerical results clearly demonstrated the potential of RHI in flame diagnostics.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1023/A:1009981104657
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