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Optical technique for direct measurement of power spectra in compressible turbulence

Papamoschou, D. and Robey, H. F. (1994) Optical technique for direct measurement of power spectra in compressible turbulence. Experiments in Fluids, 17 (1-2). pp. 10-15. ISSN 0723-4864. https://resolver.caltech.edu/CaltechAUTHORS:20170728-155431597

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Abstract

We present exploratory tests of a new optical method which measures directly two components of the 3-D power spectrum of the refractive-index fluctuation. The method was applied to a Mach 2 turbulent shear layer. Length scales of 0.1 mm to 1.0 mm were resolved within a shear-layer thickness ranging from 5 mm to 10 mm. At low-to-moderate wavenumbers, the spectral behavior is roughly κ^(−3), while at higher wavenumbers it is κ^(−3.7). These spectral slopes are in agreement with prevailing theoretical predictions for anisotropic (low-wavenumber) and isotropic (high-wavenumber) turbulence.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1007/BF02412798DOIArticle
https://link.springer.com/article/10.1007%2FBF02412798PublisherArticle
Additional Information:© 1994 Springer-Verlag. This study was funded by a grant from Lawrence Livermore National Laboratory and by a grant from the California Space Institute. DP is indebted to HFR and Dr. Alfred C. Buckingham of LLNL for their support.
Funders:
Funding AgencyGrant Number
Lawrence Livermore National LaboratoryUNSPECIFIED
California Space InstituteUNSPECIFIED
Issue or Number:1-2
Record Number:CaltechAUTHORS:20170728-155431597
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20170728-155431597
Official Citation:Papamoschou, D. & Robey, H.F. Experiments in Fluids (1994) 17: 10. https://doi.org/10.1007/BF02412798
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:79567
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:28 Jul 2017 22:58
Last Modified:03 Oct 2019 18:21

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