Characterizing shockwave propagation in waveguides by Schlieren imaging

Eetu Lampsijärvi; Kalle Hanhijärvi; Heikki Nieminen; Ari Salmi; Ivan Kassamakov; Edward Hæggström

doi:10.1109/ULTSYM.2016.7728675

Characterizing shockwave propagation in waveguides by Schlieren imaging

Eetu Lampsijärvi, Kalle Hanhijärvi, Heikki Nieminen, Ari Salmi, Ivan Kassamakov, Edward Hæggström

Not published at Aalto University

University of Helsinki

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

4 Citations (Scopus)

Abstract

Shockwaves can localize mechanical energy into a confined space. To increase the localized energy density, waveguides could be used to focus and direct shockwaves. We study the interaction between a shockwave and a waveguide. Schlieren imaging can visualize shockwaves, but few attempts to acquire quantitative pressure values for shockwaves from Schlieren imagery exist in the literature. We used a high-speed camera in a Schlieren setup to study shockwaves in V- and C-shaped waveguides. The shockwaves were generated with a pulsed Nd:YAG Q-switched laser, focused into air, to generate a breakdown spark. The Schlieren images were calibrated against a lens. We show quantitative time lapse Schlieren images from within the waveguides.

Original language	English
Title of host publication	2016 IEEE International Ultrasonics Symposium, IUS 2016
Publisher	IEEE
ISBN (Electronic)	9781467398978
DOIs	https://doi.org/10.1109/ULTSYM.2016.7728675
Publication status	Published - 1 Nov 2016
MoE publication type	A4 Conference publication
Event	IEEE International Ultrasonics Symposium - Tours, France Duration: 18 Sept 2016 → 21 Sept 2016

Publication series

Name	IEEE International Ultrasonics Symposium
Publisher	IEEE
Volume	2016-November
ISSN (Print)	1948-5719
ISSN (Electronic)	1948-5727

Conference

Conference	IEEE International Ultrasonics Symposium
Abbreviated title	IUS
Country/Territory	France
City	Tours
Period	18/09/2016 → 21/09/2016

Keywords

Quantitative Schlieren
shockwave propagation

Access to Document

10.1109/ULTSYM.2016.7728675

Cite this

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title = "Characterizing shockwave propagation in waveguides by Schlieren imaging",

abstract = "Shockwaves can localize mechanical energy into a confined space. To increase the localized energy density, waveguides could be used to focus and direct shockwaves. We study the interaction between a shockwave and a waveguide. Schlieren imaging can visualize shockwaves, but few attempts to acquire quantitative pressure values for shockwaves from Schlieren imagery exist in the literature. We used a high-speed camera in a Schlieren setup to study shockwaves in V- and C-shaped waveguides. The shockwaves were generated with a pulsed Nd:YAG Q-switched laser, focused into air, to generate a breakdown spark. The Schlieren images were calibrated against a lens. We show quantitative time lapse Schlieren images from within the waveguides.",

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author = "Eetu Lampsij{\"a}rvi and Kalle Hanhij{\"a}rvi and Heikki Nieminen and Ari Salmi and Ivan Kassamakov and Edward H{\ae}ggstr{\"o}m",

note = "Publisher Copyright: {\textcopyright} 2016 IEEE.; IEEE International Ultrasonics Symposium, IUS ; Conference date: 18-09-2016 Through 21-09-2016",

year = "2016",

month = nov,

day = "1",

doi = "10.1109/ULTSYM.2016.7728675",

language = "English",

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Lampsijärvi, E, Hanhijärvi, K, Nieminen, H, Salmi, A, Kassamakov, I & Hæggström, E 2016, Characterizing shockwave propagation in waveguides by Schlieren imaging. in 2016 IEEE International Ultrasonics Symposium, IUS 2016., 7728675, IEEE International Ultrasonics Symposium, vol. 2016-November, IEEE, IEEE International Ultrasonics Symposium, Tours, France, 18/09/2016. https://doi.org/10.1109/ULTSYM.2016.7728675

Characterizing shockwave propagation in waveguides by Schlieren imaging. / Lampsijärvi, Eetu; Hanhijärvi, Kalle; Nieminen, Heikki et al.
2016 IEEE International Ultrasonics Symposium, IUS 2016. IEEE, 2016. 7728675 (IEEE International Ultrasonics Symposium; Vol. 2016-November).

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

TY - GEN

T1 - Characterizing shockwave propagation in waveguides by Schlieren imaging

AU - Lampsijärvi, Eetu

AU - Hanhijärvi, Kalle

AU - Nieminen, Heikki

AU - Salmi, Ari

AU - Kassamakov, Ivan

AU - Hæggström, Edward

PY - 2016/11/1

Y1 - 2016/11/1

N2 - Shockwaves can localize mechanical energy into a confined space. To increase the localized energy density, waveguides could be used to focus and direct shockwaves. We study the interaction between a shockwave and a waveguide. Schlieren imaging can visualize shockwaves, but few attempts to acquire quantitative pressure values for shockwaves from Schlieren imagery exist in the literature. We used a high-speed camera in a Schlieren setup to study shockwaves in V- and C-shaped waveguides. The shockwaves were generated with a pulsed Nd:YAG Q-switched laser, focused into air, to generate a breakdown spark. The Schlieren images were calibrated against a lens. We show quantitative time lapse Schlieren images from within the waveguides.

AB - Shockwaves can localize mechanical energy into a confined space. To increase the localized energy density, waveguides could be used to focus and direct shockwaves. We study the interaction between a shockwave and a waveguide. Schlieren imaging can visualize shockwaves, but few attempts to acquire quantitative pressure values for shockwaves from Schlieren imagery exist in the literature. We used a high-speed camera in a Schlieren setup to study shockwaves in V- and C-shaped waveguides. The shockwaves were generated with a pulsed Nd:YAG Q-switched laser, focused into air, to generate a breakdown spark. The Schlieren images were calibrated against a lens. We show quantitative time lapse Schlieren images from within the waveguides.

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M3 - Conference article in proceedings

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T3 - IEEE International Ultrasonics Symposium

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Y2 - 18 September 2016 through 21 September 2016

ER -

Characterizing shockwave propagation in waveguides by Schlieren imaging

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Keywords

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