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@article{Chantriaux:2022,
author = {Chantriaux, F and Quenouille, T and Doan, NAK and Swaminath, N and Hardalupas, I and Taylor, AMKP},
journal = {Combustion and Flame},
pages = {1--14},
title = {Multiscale analysis of turbulence-flame interaction based on measurements in premixed flames},
url = {https://www.sciencedirect.com/science/article/pii/S0010218022000013?via%3Dihub},
volume = {239},
year = {2022}
}

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TY  - JOUR
AB  - Multi-scale analysis of turbulence–flame interaction is performed using experimental data sets from three methane- and propane-fired premixed, turbulent V-flames, at an approach flow turbulent Reynolds number of 450 and a ratio of r.m.s. fluctuating velocity from the mean to laminar flame speed of between 2.1 and 3.0, straddling the border between corru-gated flamelets and thin reaction zone in the Borghi-Peters diagram. The measurements were made in the plane of a single laser sheet using stereo particle image velocimetry SPIV and planar laser-induced fluorescence to measure three orthogonal components of velocityand flame OH. Methods to approximate the remaining, unmeasured, out of plane derivatives are described. The instantaneous SPIV images were bandpass filtered at user-specified characteristic length scales Lω and Ls (for vorticity and strain rate, respectively) resulting in instantaneous bandpass-filtered velocity fields, uLω b and uLs b , which were further analysedto give the bandpass filtered vorticity field, ωLω = ∇ × uLωb , the strain-rate field, eLs ij , and the tangential strain rate field aLsT .This work quantifies two aspects of turbulence-flame interaction. The first aspect is that of the flame interaction of eddies of size Ls on the turbulence, as found by the statistics of the alignment of vorticity with strain rate. We find that vortical eddies with scale about Lω = 2δth (where δth is the flame thickness) are stretched by Ls structures which are largerthan about 2 Lω, with this factor broadly true also for vortical eddies of scales Lω = 4δth and Lω = 6δth. Within the limitations of the data set, these findings are consistent with those in the literature on reacting and non-reacting flows, suggesting that the premixed flame has had little influence on the vortex stretching mechanism.The second aspect of turbulence-flame interaction examined is that of
AU  - Chantriaux,F
AU  - Quenouille,T
AU  - Doan,NAK
AU  - Swaminath,N
AU  - Hardalupas,I
AU  - Taylor,AMKP
EP  - 14
PY  - 2022///
SN  - 0010-2180
SP  - 1
TI  - Multiscale analysis of turbulence-flame interaction based on measurements in premixed flames
T2  - Combustion and Flame
UR  - https://www.sciencedirect.com/science/article/pii/S0010218022000013?via%3Dihub
UR  - http://hdl.handle.net/10044/1/93828
VL  - 239
ER  -

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