caa a22 4500 606198164 CHVBK 20210128100932.0 cr unu---uuuuu 210128e20151001xx s 000 0 eng 10.1007/s00348-015-2053-0 doi (NATIONALLICENCE)springer-10.1007/s00348-015-2053-0 Development of a Dual-PIV system for high-speed flow applications [Elektronische Daten] [Anne-Marie Schreyer, Jean Lasserre, Pierre Dupont] A new Dual-particle image velocimetry (Dual-PIV) system for application in supersonic flows was developed. The system was designed for shock wave/turbulent boundary layer interactions with separation. This type of flow places demanding requirements on the system, from the large range of characteristic frequencies O(100Hz-100kHz) to spatial and temporal resolutions necessary for the measurement of turbulent quantities (Dolling in AIAA J 39(8):1517-1531, 2001; Dupont et al. in J Fluid Mech 559:255-277, 2006; Smits and Dussauge in Turbulent shear layers in supersonic flow, 2nd edn. Springer, New York, 2006). While classic PIV systems using high-resolution CCD sensors allow high spatial resolution, these systems cannot provide the required temporal resolution. Existing high-speed PIV systems provide temporal and CMOS sensor resolutions, and even laser pulse energies, that are not adapted to our needs. The only obvious solution allowing sufficiently high spatial resolution, access to high frequencies, and a high laser pulse energy is a multi-frame system: a Dual-PIV system, consisting of two synchronized PIV systems observing the same field of view, will give access to temporal characteristics of the flow. The key technology of our system is frequency-based image separation: two lasers of different wavelengths illuminate the field of view. The cross-pollution with laser light from the respective other branches was quantified during system validation. The overall system noise was quantified, and the prevailing error of only 2% reflects the good spatial and temporal alignment. The quality of the measurement system is demonstrated with some results on a subsonic jet flow including the spatio-temporal inter-correlation functions between the systems. First measurements in a turbulent flat-plate boundary layer at Mach 2 show the same satisfactory data quality and are also presented and discussed. Springer-Verlag Berlin Heidelberg, 2015 Schreyer Anne-Marie Centre National d'Etudes Spatiales CNES, DLA, 75612, Paris Cedex, France aut Lasserre Jean Dantec Dynamics, 91620, Nozay, France aut Dupont Pierre Aix-Marseille Université, CNRS, IUSTI UMR 7343, 13013, Marseille, France aut Experiments in Fluids Springer Berlin Heidelberg 56/10(2015-10-01), 1-12 0723-4864 56:10<1 2015 56 348 https://doi.org/10.1007/s00348-015-2053-0 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00348-015-2053-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Schreyer Anne-Marie Centre National d'Etudes Spatiales CNES, DLA, 75612, Paris Cedex, France aut NATIONALLICENCE 700 1- Lasserre Jean Dantec Dynamics, 91620, Nozay, France aut NATIONALLICENCE 700 1- Dupont Pierre Aix-Marseille Université, CNRS, IUSTI UMR 7343, 13013, Marseille, France aut NATIONALLICENCE 773 0- Experiments in Fluids Springer Berlin Heidelberg 56/10(2015-10-01), 1-12 0723-4864 56:10<1 2015 56 348