Combined use of High-Speed Videography and PDV Profilometry for Measuring High Speeds Flyers and Impact Shock Dynamics
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Date
2025-08-26
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Abstract
Challenges remain in understanding the dynamic forces that occur with small scale
explosive detonations and the subsequent impact those forces have on flyer velocity and
deformation profiles. This work presents two data acquisition techniques for probing the
behavior of various materials disturbed by laser induced detonations. The physical reactions
of metallic flyers and transparent acrylic are cataloged and measured. The data acquisition
techniques described here are high speed videography, Photon Doppler Velocimetry
Profilometry (usually referred to as PDV Profilometry). High-speed videography provides
a detailed temporal view of shock wave propagation, impact pressure distribution, and
plasma plume dynamics. A Shimadzu Hypervision HPV-X2 camera was used at up to 10
million frames per second. For nanosecond scale velocity measurements PDV Profilometry
was used to capture flyer velocity, acceleration, and deformation. PDV profilometry is a
relatively new technique, here its ability to collect 8 or more velocity profiles at up to 750
km/s from a single PDV probe is demonstrated. Measurements of a shock front induced by
the collision of a super sonic flyer against the surface of an acrylic cube is observed using
the high speed camera. In this acrylic collision experiment impact and shock speeds up to
10km/s are recorded. Combining these techniques, a wide variety of experiments may be
undertaken and observed with remarkable clarity in the nanosecond to microsecond time
domain.
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Keywords
Transient impact pressure, High Speed Imaging, PDV Profilometry, Photon Doppler Velocimetry (PDV), Augmented laser impact Process, Shock wave, Pressure attenuation
Subjects based on RSWK
Hochgeschwindigkeitsfotografie, Planar-Doppler-Velocimetry, Druck, Aufprall, Stoßwelle