Measurement of shock wave unsteadiness using a high-speed schlieren system and digital image processing.

Abstract

A 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.

• Authors: D Estruch, N J Lawson, D G MacManus, K P Garry, J L Stollery
• Journal: The Review of scientific instruments (Rev Sci Instrum) Vol. 79 Issue 12 Pg. 126108 (Dec 2008) ISSN: 1089-7623 [Electronic] United States
• PMID: 19123599 (Publication Type: Journal Article)