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Measurements of scalar power spectra in high Schmidt number turbulent jets

Miller, Paul L. and Dimotakis, Paul E. (1992) Measurements of scalar power spectra in high Schmidt number turbulent jets. California Institute of Technology , Pasadena, CA. (Unpublished) http://resolver.caltech.edu/CaltechAUTHORS:20141021-163918527

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Abstract

Single-point, jet-fluid concentration measurements obtained from high Schmidt number (Sc ≃ 1.9 x 10^3) turbulent jets permit an investigation of temporal scalar power spectra, for jet Reynolds numbers in the range of 1.25 ≤ Re x 10^(-4)≤ 7.2. At intermediate scales, we find a spectrum with a logarithmic derivative (slope) that is increasing with Reynolds number, in absolute value, but less than 5/3 at the highest Reynolds number in our experiments. At the smallest scales, our spectra exhibit no k^(-1) power-law behavior, possessing a log-normal region over a range of scales exceeding a factor of 40, in some cases.


Item Type:Report or Paper (Technical Report)
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Additional Information:© 1992 California Institute of Technology GALCIT Report FM92-3. We would like to acknowledge contributions by Dan Lang and David Dowling to the experiments. This work was supported by AFOSR Grants No. 83-0213 and 88-0155. and GRI Contract No. 5087-260-1467.
Group:Graduate Aeronautical Laboratories (Fluid Mechanics), GALCIT
Funders:
Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)83-0213
Air Force Office of Scientific Research (AFOSR)88-0155
Gas Research Institute (GRI)5087-260-1467
Record Number:CaltechAUTHORS:20141021-163918527
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20141021-163918527
Official Citation:MILLER,P . L. & DIMOTAKIS, P. E. 1992 "Measurements of scalar power spectra in high Schmidt number turbulent jets," GALCIT Report FM92-3.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:50650
Collection:CaltechGALCITFM
Deposited By: Kristin Buxton
Deposited On:22 Oct 2014 19:16
Last Modified:21 Sep 2016 23:05

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