A particle image velocimetry (PIV) system has ben developed for use in high-speed separated air flows. The i,age acquisition system uses two 550 mJ/pulse Nd:YAG lasers and is fully controlled by a host Macintosh computer. The interrogation system is also Macintosh-based and performs interrogations at approximately 2.3 sec/spot and 4.0 sec/spot when using the Young's fringe and autocorrelation methods, respectively. The system has been proven in preliminary experiments using known-displacement simulated PIV photographs and a simple axisymmetric jet flow. Further results have been obtained in a transonic wind tunnel operating at Mach 0.4 to 0.5(135 m/s to 170 m/s). PIV experiments were done with an emptest section to provide uniform flow data for comparison with pressure and LDV data, then with a two-dimensional base model, revealing features of the van Karman vortex street wake and underlying small scale turbulence.
Development and application of a particle image velocimeter for high-speeds flows
Entwicklung und Anwendung eines Geschwindigkeitsmessers mit Partikelabbildung für Hochgeschwindigkeitsströmungen
AIAA-Papers ; 1-12
1992
12 Seiten, 12 Bilder, 1 Tabelle, 15 Quellen
Aufsatz (Konferenz)
Englisch
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