Published November 2, 1992
| Submitted
Technical Report
Open
Measurements of scalar power spectra in high Schmidt number turbulent jets
- Creators
- Miller, Paul L.
- Dimotakis, Paul E.
Chicago
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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.
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.Attached Files
Submitted - measurements_of_scalar.pdf
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Additional details
- Eprint ID
- 50650
- DOI
- 10.7907/hpdt-2e37
- Resolver ID
- CaltechAUTHORS:20141021-163918527
- 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
- Created
-
2014-10-22Created from EPrint's datestamp field
- Updated
-
2021-11-17Created from EPrint's last_modified field
- Caltech groups
- Graduate Aeronautical Laboratories (Fluid Mechanics), GALCIT
- Other Numbering System Name
- GALCIT Report FM
- Other Numbering System Identifier
- 92-3