caa a22 4500 477093140 CHVBK 20180405111520.0 cr unu---uuuuu 170330e19960101xx s 000 0 eng 10.1007/BF00190276 doi (NATIONALLICENCE)springer-10.1007/BF00190276 Evaluation of instationary flow fields using crosscorrelation in image sequences [Elektronische Daten] [J. Hartmann, J. Köhler, W. Stolz, H. Flögel] In order to investigate the temporal behavior of dynamic flow processes, a movie version of particle image velocimetry (PIV) with a high framing capability has been developed. The experimental setup includes a copper vapor laser capable to produce pulse sequences with more than 100 pulses with a repetition rate of up to 30 kHz and a rotating drum camera to record the Mie scattering signals from the particles seeded to the flow. With this setup, image sequences with a number of consecutive images (40-70 depending on the image size) of a dynamic process can be taken on high resolution 36 mm film. To evaluate the 2-dimensional velocity vector fields, an algorithm based on the crosscorrelation of subareas in consecutive images has been developed and optimized in terms of computing time. The technique was applied to resolve the instationary flow field in a single cylinder spark ignition (SI) engine during the compression stroke. Springer-Verlag, 1996 Hartmann J. Institut für Physikalische Elektronik Universität Stuttgart, Pfaffenwaldring 47, D-70569, Stuttgart, Germany aut Köhler J. Institut für Physikalische Elektronik Universität Stuttgart, Pfaffenwaldring 47, D-70569, Stuttgart, Germany aut Stolz W. Institut für Physikalische Elektronik Universität Stuttgart, Pfaffenwaldring 47, D-70569, Stuttgart, Germany aut Flögel H. Institut für Physikalische Elektronik Universität Stuttgart, Pfaffenwaldring 47, D-70569, Stuttgart, Germany aut Experiments in Fluids Springer-Verlag 20/3(1996-01-01), 210-217 0723-4864 20:3<210 1996 20 348 https://doi.org/10.1007/BF00190276 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00190276 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hartmann J. Institut für Physikalische Elektronik Universität Stuttgart, Pfaffenwaldring 47, D-70569, Stuttgart, Germany aut NATIONALLICENCE 700 1- Köhler J. Institut für Physikalische Elektronik Universität Stuttgart, Pfaffenwaldring 47, D-70569, Stuttgart, Germany aut NATIONALLICENCE 700 1- Stolz W. Institut für Physikalische Elektronik Universität Stuttgart, Pfaffenwaldring 47, D-70569, Stuttgart, Germany aut NATIONALLICENCE 700 1- Flögel H. Institut für Physikalische Elektronik Universität Stuttgart, Pfaffenwaldring 47, D-70569, Stuttgart, Germany aut NATIONALLICENCE 773 0- Experiments in Fluids Springer-Verlag 20/3(1996-01-01), 210-217 0723-4864 20:3<210 1996 20 348 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer