Optical imaging of propagating Mach cones in water using refracto-vibrometry | Zendy

Nathan R. Huber | Zendy; Thomas M. Huber | Zendy; Matthew T. Huber | Zendy

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Optical imaging of propagating Mach cones in water using refracto-vibrometry

Author(s) -

Nathan R. Huber,

Thomas M. Huber,

Matthew T. Huber

Publication year - 2017

Publication title -

the journal of the acoustical society of america

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.619

H-Index - 187

eISSN - 1520-8524

pISSN - 0001-4966

DOI - 10.1121/1.4977099

Subject(s) - mach number , laser doppler vibrometer , optics , shear waves , shear (geology) , acoustics , materials science , laser doppler velocimetry , physics , laser , mechanics , laser beams , medicine , blood flow , composite material

Refracto-vibrometry was used to optically image propagating Mach cones in water. These Mach cones were produced by ultrasonic longitudinal and shear waves traveling through submerged 12.7 mm diameter metal cylinders. Full-field videos of the propagating wave fronts were obtained using refracto-vibrometry. A laser Doppler vibrometer, directed at a retroreflective surface, sampled time-varying water density at numerous scan points. Wave speeds were determined from the Mach cone apex angles; the measured longitudinal and shear wave speeds in steel (6060 ± 170 m/s and 3310 ± 110 m/s, respectively) and beryllium (12 400 ± 700 m/s and 8100 ± 500 m/s) agreed with published values.

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