caa a22 4500 606198830 CHVBK 20210128100935.0 cr unu---uuuuu 210128e20150201xx s 000 0 eng 10.1007/s00348-014-1877-3 doi (NATIONALLICENCE)springer-10.1007/s00348-014-1877-3 Investigation of transverse jet injections in a supersonic crossflow using fast-responding pressure-sensitive paint [Elektronische Daten] [Jim Crafton, Alan Forlines, Steve Palluconi, Kuang-Yu Hsu, Campbell Carter, Mark Gruber] Traditional pressure-sensitive paint (PSP) systems can provide data with high spatial resolution; however, the bandwidth is limited to a few Hz by the response time of the paint. Fast-responding paints have demonstrated response times of up to 100kHz. Ultra-bright LEDs and fast-framing cameras combined with a porous polymer PSP can be used to produce a system capable of both high spatial resolution and high temporal bandwidth. Measurements of mean and unsteady pressure have been acquired on an experimental setup composed of a Mach-2 channel flow with transverse jet injection. The unsteady pressure data clearly resolve structures not present in the mean pressure data, including multiple lambda shocks upstream of a strong bow shock, high-frequency perturbations in the location of these shocks, and significant deformations of the bow shock structure. Time series of data can be extracted at each pixel, and the spectral content and phase relationship of the flow can be presented as maps of pressure fluctuations at specific frequencies or as correlation coefficients between a control point and the remaining flow. This type of map can be created using arrays of fast pressure transducers; here, we present data representing an array of over 26,000 fast pressure transducers. Springer-Verlag Berlin Heidelberg, 2015 Crafton Jim Innovative Scientific Solutions, Inc., Dayton, OH, USA aut Forlines Alan Innovative Scientific Solutions, Inc., Dayton, OH, USA aut Palluconi Steve Innovative Scientific Solutions, Inc., Dayton, OH, USA aut Hsu Kuang-Yu Innovative Scientific Solutions, Inc., Dayton, OH, USA aut Carter Campbell Air Force Research Laboratory, Wright-Patterson AFB, Dayton, OH, USA aut Gruber Mark Air Force Research Laboratory, Wright-Patterson AFB, Dayton, OH, USA aut Experiments in Fluids Springer Berlin Heidelberg 56/2(2015-02-01), 1-15 0723-4864 56:2<1 2015 56 348 https://doi.org/10.1007/s00348-014-1877-3 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/s00348-014-1877-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Crafton Jim Innovative Scientific Solutions, Inc., Dayton, OH, USA aut NATIONALLICENCE 700 1- Forlines Alan Innovative Scientific Solutions, Inc., Dayton, OH, USA aut NATIONALLICENCE 700 1- Palluconi Steve Innovative Scientific Solutions, Inc., Dayton, OH, USA aut NATIONALLICENCE 700 1- Hsu Kuang-Yu Innovative Scientific Solutions, Inc., Dayton, OH, USA aut NATIONALLICENCE 700 1- Carter Campbell Air Force Research Laboratory, Wright-Patterson AFB, Dayton, OH, USA aut NATIONALLICENCE 700 1- Gruber Mark Air Force Research Laboratory, Wright-Patterson AFB, Dayton, OH, USA aut NATIONALLICENCE 773 0- Experiments in Fluids Springer Berlin Heidelberg 56/2(2015-02-01), 1-15 0723-4864 56:2<1 2015 56 348