Accuracy and resolution issues in NO/acetone PLIF measurements of gas-phase molecular mixing |
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| Authors: | T R Meyer G F King G C Martin R P Lucht F R Schauer J C Dutton |
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| Institution: | (1) University of Illinois Department of Mechanical and Industrial Engineering 1206 West Green Street, Urbana, IL 61801, USA e-mail: trmeyer@innssi.com, US;(2) 3 M Engineering Systems Technology Center 518-1-01, 3 M Center, St. Paul, MN 55144, USA, US;(3) Texas A&M University Department of Mechanical Engineering College Station, TX 77843, USA, US;(4) Air Force Research Laboratory Building 490, 1790 Loop Road North Wright-Patterson AFB, OH 45433, USA, US |
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| Abstract: | Under-resolved passive-scalar measurements in liquid and gaseous shear layers have been known to over-predict mixed-fluid
quantities as a result of sub-resolution stirring. In recent studies, simultaneous cold-chemistry (nitric oxide) and passive-scalar
(acetone) planar laser-induced fluorescence have been employed for the measurement of sub-resolution molecular mixing. In
the current work, the theory and experimental approach of this technique are reviewed, and new analyses of quenching corrections,
differential diffusion errors, and imaging resolution are presented. Results from both experimental work and direct numerical
simulations indicate that this technique provides a successful means of quantifying macro- and micro-scale turbulent molecular
mixing in gaseous shear flows.
Received: 20 December 2000/Accepted: 24 September 2001 |
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