Investigation of the unsteadiness of a shock-reflection interaction with time-resolved particle image velocimetryReport as inadecuate




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Shock Waves

, Volume 21, Issue 5, pp 397–409

First Online: 24 February 2011Received: 16 April 2010Revised: 10 September 2010Accepted: 04 February 2011

Abstract

The spatio-temporal dynamics of an impinging shock-boundary layer interaction at Mach 2 and under incipient separation conditions, has been investigated experimentally by means of high-speed particle image velocimetry PIV. The available PIV acquisition rate of up to 20 kHz permits a time-resolved characterization of the interaction. The dynamics of different flow regions—notably the separation region and the reflected shock—were quantified by means of temporal auto-correlation fields and pseudo-spectral analysis. The PIV data further enable to investigate the relationship between spatially extended flow features, such as shock position and bubble size, as well as the influence of the upstream boundary layer. The results confirm earlier studies that there is an important upstream effect on the present incipient interaction.

KeywordsShock wave boundary layer interaction Particle image velocimetry Communicated by K. Hannemann.

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Author: B. W. van Oudheusden - A. J. P. Jöbsis - F. Scarano - L. J. Souverein

Source: https://link.springer.com/



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