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Published in:
2017 | OriginalPaper | Chapter
Flow Phenomena of An Expansion Wave Entering a Cylindrical Cavity
Authors : M. S. Whalley, B. W. Skews, R. T. Paton
Published in: 30th International Symposium on Shock Waves 1
Publisher: Springer International Publishing
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Abstract
Previous research on wave focusing has concentrated on shock wave cavity flows [1]. Expansion wave cavity flows have not been investigated before. This paper looks at the flow resulting from an expansion wave entering a cylindrical cavity. Initially numerical simulations were run with the assumption of a plane diaphragm, however after experimental testing it was found that an investigation of the effect of a curved diaphragm also needed to be done. An expansion wave is a pressure wave which causes the fluid it travels through to decrease in pressure. As expansions cause a decrease in pressure they tend to flatten out (decrease in gradient) as they travel through a fluid. This makes them difficult to visualise as generally they are associated with weak gradients [2]. The interaction between shock and expansion waves has been investigated, as has the diffraction of an expansion wave around a corner [3].