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ID 56133
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Author
Kouchi, Toshinori Department of Mechanical and System Engineering, Okayama University
Oka, Yoshinori Department of Aerospace Engineering, Tohoku University
Masuya, Goro Department of Aerospace Engineering, Tohoku University
Yanase, Shinichiro Department of Mechanical and System Engineering, Okayama University
Abstract
A combined stereoscopic particle image velocimetry (PIV) and acetone planar laser-induced fluorescence (PLIF) measurement system was developed to investigate turbulent mixing of a jet into a supersonic flow. The measurement was performed using a supersonic wind tunnel. Air was injected perpendicular into a Mach 2 freestream with a jet-to-freestream momentum ratio of 2.2. The system successfully measured the molar concentration of the jet using PLIF and the velocity in the flow-field using PIV simultaneously. These data yielded turbulent eddy diffusive flux that is a product of fluctuating velocity (v') and concentration (c'). The eddy flux of the streamwise component (c'u') was negative, and that of the heightwise component (c'v') was positive in the outer jet boundary region. Large-scale structures were periodically generated in the outer jet boundary and convected downstream. This large-scale motion induced negative c'u' and positive c'v' in the outer jet boundary. In the inner region of the jet, the air entrained by the counter-rotating vortices induced a positive v' and negative c' region, resulting in negative c'v'.
Keywords
Advanced Laser Diagnostics
Turbulent Mixing
Turbulent Eddy Diffusive Flux
Supersonic Combustor
Scramjet
Published Date
2014-12-03
Publication Title
Transactions of the Japan Society for Aeronautical and Space Sciences, Aerospace Technology Japan
Volume
volume12
Issue
issueAPISAT-2013
Publisher
The Japan Society for Aeronautical and Space Sciences
Start Page
a85
End Page
a92
ISSN
1884-0485
Content Type
Journal Article
language
英語
OAI-PMH Set
岡山大学
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publisher
DOI
Related Url
isVersionOf https://doi.org/10.2322/tastj.12.a85