caa a22 4500 606197303 CHVBK 20210128100928.0 cr unu---uuuuu 210128e20150601xx s 000 0 eng 10.1007/s00348-015-2004-9 doi (NATIONALLICENCE)springer-10.1007/s00348-015-2004-9 Particle imaging through planar shock waves and associated velocimetry errors [Elektronische Daten] [G. Elsinga, G. Orlicz] When imaging particles through a shock wave, the resulting particle image appears blurred and at the wrong location, which is referred to as a position error. Particle image doublets are observed if only part of the light scattered by a particle is deflected or reflected by the shock. These optical distortions are due to the jump in the refractive index that occurs over the shock. Within the context of popular particle-based velocimetry techniques, such as particle image velocimetry and particle tracking velocimetry, the position error propagates into an error in the measured velocity. These particle image distortions and associated errors are assessed and quantified in this paper for the case of planar shocks by means of a light ray tracing approach and by experiments. The errors are shown to be most sensitive to the angle between the viewing direction and the plane of the shock. Increasing this angle to modest values (~5°) is a particularly effective way to decrease the relative velocity error. Looking at the shock from the high-density side is recommended when the accurate determination of the particle response to the shock wave is desired. The Author(s), 2015 Elsinga G. Laboratory for Aero and Hydrodynamics, Department of Mechanical, Maritime and Materials Engineering, Delft University of Technology, Leeghwaterstraat 21, 2628 CA, Delft, The Netherlands aut Orlicz G. Physics Division, MS H803, Los Alamos National Laboratory, 87545, Los Alamos, NM, USA aut Experiments in Fluids Springer Berlin Heidelberg 56/6(2015-06-01), 1-12 0723-4864 56:6<1 2015 56 348 https://doi.org/10.1007/s00348-015-2004-9 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/s00348-015-2004-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Elsinga G. Laboratory for Aero and Hydrodynamics, Department of Mechanical, Maritime and Materials Engineering, Delft University of Technology, Leeghwaterstraat 21, 2628 CA, Delft, The Netherlands aut NATIONALLICENCE 700 1- Orlicz G. Physics Division, MS H803, Los Alamos National Laboratory, 87545, Los Alamos, NM, USA aut NATIONALLICENCE 773 0- Experiments in Fluids Springer Berlin Heidelberg 56/6(2015-06-01), 1-12 0723-4864 56:6<1 2015 56 348