FullText URL TransJSASS_12_85.pdf
Author Kouchi, Toshinori| Oka, Yoshinori| Masuya, Goro| Yanase, Shinichiro|
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
File Version publisher
DOI 10.2322/tastj.12.a85
Related Url isVersionOf https://doi.org/10.2322/tastj.12.a85