Paper N–4: A Study of the Structure and Ultrasonic Emission of a High-Velocity Air Jet by High-Speed Schlieren and Shadowgraph Techniques

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Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: J SMPTE
Volume: 71, No. 1A, pp. 508–509
Abstract: A high-speed air jet creates an ultrasonic acoustic field which can be visualized by schlieren techniques. In this manner certain relations between the emitted frequency and the generating pressure can be determined. Furthermore, the shadowgraph method supplies, for a given pressure, two types of information according to the duration of the exposure: (1) With exposures of the order of one second one observes, by integration, a characteristic cellular structure. (2) With exposures of the order of one microsecond one observes this structure at a given moment, and — using an ultra-high-speed electronic camera (e.g. at 105 frames/sec) — a periodic oscillation of the jet is shown. It is found that this period is the same as that of the emitted frequency. If each single frame of the electronic camera is repeated a number of times on a film, it is possible to project all the details of these phenomena in slow motion.
Publication Date: 1962-01-01
DOI: 10.5594/J18187XY
ISSN: Print: 0361-4573
Link: https://doi.org/10.5594/J18187XY
Author(s): Francois Canac
Marie Merle
Copyright: © 1962 Society of Motion Picture and Television Engineers, Inc.

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Francois Canac and Marie Merle; Paper N–4: A Study of the Structure and Ultrasonic Emission of a High-Velocity Air Jet by High-Speed Schlieren and Shadowgraph Techniques, Journal of the SMPTE ( Volume: 71, Issue: 1A, 1962); SMPTE, 1962. Available at https://doi.org/10.5594/J18187XY

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Francois Canac and Marie Merle; Paper N–4: A Study of the Structure and Ultrasonic Emission of a High-Velocity Air Jet by High-Speed Schlieren and Shadowgraph Techniques, Journal of the SMPTE ( Volume: 71, Issue: 1A, 1962); SMPTE, 1962. Available at https://doi.org/10.5594/J18187XY

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<span class="citation">Francois Canac and Marie Merle; <cite>Paper N–4: A Study of the Structure and Ultrasonic Emission of a High-Velocity Air Jet by High-Speed Schlieren and Shadowgraph Techniques</cite>, Journal of the SMPTE ( Volume: 71, Issue: 1A, 1962); SMPTE, 1962. Available at <a href="https://doi.org/10.5594/J18187XY" target="_blank" rel="noopener">https://doi.org/10.5594/J18187XY</a></span>

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<li>
Francois Canac and Marie Merle; <cite id="bib-10-5594-j18187xy">Paper N–4: A Study of the Structure and Ultrasonic Emission of a High-Velocity Air Jet by High-Speed Schlieren and Shadowgraph Techniques</cite>, Journal of the SMPTE ( Volume: 71, Issue: 1A, 1962); SMPTE, 1962
<span class="doi">10.5594/J18187XY</span>
</li>