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Erschienen in: Experiments in Fluids 3/2004

01.09.2004 | Original

Measurement of velocity-temperature correlations in a turbulent diffusion flame

verfasst von: M. J. Tummers, E. H. van Veen, N. George, R. Rodink, K. Hanjalić

Erschienen in: Experiments in Fluids | Ausgabe 3/2004

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Abstract

The paper reports on the nonintrusive, simultaneous measurement of velocity and temperature fluctuations in a turbulent jet diffusion flame. Velocity fluctuations were measured using laser Doppler anemometry (LDA), whereas coherent anti-Stokes Raman spectroscopy (CARS) was used for temperature measurements. The simultaneous measurements were affected by both density bias and velocity bias because the LDA imposed a form of biased sampling on the CARS. The measured velocity-temperature correlation coefficients indicated that the gradient-diffusion hypothesis is reasonably accurate for the radial direction. However, for the axial direction the gradient diffusion hypothesis is accurate only in the central region of the flame, while countergradient diffusion is found in the outer region.

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Metadaten
Titel
Measurement of velocity-temperature correlations in a turbulent diffusion flame
verfasst von
M. J. Tummers
E. H. van Veen
N. George
R. Rodink
K. Hanjalić
Publikationsdatum
01.09.2004
Verlag
Springer-Verlag
Erschienen in
Experiments in Fluids / Ausgabe 3/2004
Print ISSN: 0723-4864
Elektronische ISSN: 1432-1114
DOI
https://doi.org/10.1007/s00348-004-0825-z

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