Estruch-Samper, DavidLawson, Nicholas J.MacManus, David G.Garry, Kevin P.Stollery, J. L.2010-05-062010-05-062008-12Estruch-Samper D, Lawson NJ, MacManus DG, et al., (2008) Measurement of shock wave unsteadiness using a high-speed schlieren system and digital image processing. Review of Scientific Instruments, Volume 79, Issue 12, December 2008, pp. 1261081-12610830034-6748http://dx.doi.org/10.1063/1.3053361http://hdl.handle.net/1826/4402A new method to measure shock wave unsteadiness is presented. Time-resolved visualizations of the flow field under investigation are obtained using a high-speed schlieren optical system and the motion of the shock wave is determined by means of digital image processing. Information on the shock’s unsteadiness is subsequently derived with Fourier analysis. A sample study on shock unsteadiness in a shock-wave/turbulent boundary-layer interaction with separation is included. The method presented enables a measure of shock unsteadiness at locations in the imaged flow field not accessible by intrusive methods.enCopyright 2008 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in D. Estruch, N. J. Lawson, D. G. MacManus, K. P. Garry, and J. L. Stollery, Measurement of shock wave unsteadiness using a high-speed schlieren system and digital image processing, Review of Scientific Instruments, 2008, Volume 79, Issue 12, Pages 1261081-1261083 and may be found at http://dx.doi.org/10.1063/1.3053361.Article