Unsteady shock wave diagnostics with high-speed imaging

B. W. Skews; H. Kleine; D. MacLucas; K. Takehara; H. Teranishi; T. G. Etoh

doi:10.1117/12.821329

10 February 2009 Unsteady shock wave diagnostics with high-speed imaging

B. W. Skews, H. Kleine, D. MacLucas, K. Takehara, H. Teranishi, T. G. Etoh

Proceedings Volume 7126, 28th International Congress on High-Speed Imaging and Photonics; 71260F (2009) https://doi.org/10.1117/12.821329
Event: 28th International Congress on High-Speed Imaging and Photonics, 2008, Canberra, Australia

Abstract

The visual study of unsteady shock wave dynamics has in the past predominantly been done using single-shot images. The advent of ultra-fast, good-resolution high-speed digital cameras has changed this state of affairs and allows the true development of the flow to be studied. It enables the detection of weaker features which are easily overlooked in singleshot visualizations by virtue of the fact that human vision is very sensitive to detecting the motion of an object, even if it generates only a faint optical signal. Recent application of these devices to the study of the focusing of a shock wave in a cylindrical cavity has identified a number of previously unknown features, while other features that previously had been inadequately reported could be clearly identified and explained The observation of deliberately generated weak disturbances allows the quantification of which part of the flow is influenced by which part of the boundaries encompassing it. Whilst the imaging itself is very useful it is also highly desirable to use techniques from which quantitative data can be obtained. Color, such as in direction- and magnitude-indicating color schlieren, and polychrome shearing interferometry, adds an additional dimension to such investigations.

Citation Download Citation

B. W. Skews, H. Kleine, D. MacLucas, K. Takehara, H. Teranishi, and T. G. Etoh "Unsteady shock wave diagnostics with high-speed imaging", Proc. SPIE 7126, 28th International Congress on High-Speed Imaging and Photonics, 71260F (10 February 2009); https://doi.org/10.1117/12.821329

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