Using Schlieren imaging to estimate the geometry of a shock wave radiated by a trumpet bell

The Schlieren method has been used before to visualize weak shock waves radiated from the open ends of brass instruments, but no attempt has previously been undertaken, however, to measure the geometry of the radiated wavefronts using the Schlieren images. In this paper Schlieren visualization is us...

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Bibliographic Details
Published in:The Journal of the Acoustical Society of America 2018-10, Vol.144 (4), p.EL310-EL314
Main Authors: Rendón, Pablo L., Velasco-Segura, Roberto, Echeverría, Carlos, Porta, David, Pérez-López, Antonio, Vázquez-Turner, R. Teo, Stern, Catalina
Format: Article
Language:English
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Summary:The Schlieren method has been used before to visualize weak shock waves radiated from the open ends of brass instruments, but no attempt has previously been undertaken, however, to measure the geometry of the radiated wavefronts using the Schlieren images. In this paper Schlieren visualization is used to estimate the geometry of the two-dimensional shock wavefronts radiated from the bell of a trumpet at different frequencies. It is observed that the geometry of the shocks does change with frequency, in the expected manner. The propagation speeds of these shocks are also calculated, and they too exhibit the anticipated behavior.
ISSN:0001-4966
1520-8524
DOI:10.1121/1.5063810