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PIV space-time resolution of flow behind blast waves

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Abstract

An ultra-high speed, time-resolved particle image velocimetry (PIV) system is developed to measure velocity fields created by explosive detonators. When initiated into a gas, the detonators generate blast waves that propagate outwards from the origin of initiation at supersonic speeds. The PIV system consists of a custom eight-pulse Nd:YAG laser system and an ultra-high speed camera system comprising four dual-frame CCD cameras optically combined to share a single optic axis. The system is capable of sampling the flow field four times at up to 333 MHz or eight times at up to 8 MHz. System development is discussed, and preliminary application to the complex flow behind the blast wave from an exploding bridge wire detonator is demonstrated.

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Acknowledgments

Funding was provided by the Joint DOD/DOE Munitions Program. Los Alamos National Lab is operated by Los Alamos National Security, LLC, under Contract No. DE-AC52-06NA25396 with the U.S. Department of Energy. The authors wish to thank Jon Baltzer for his technical assistance during data analysis.

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Authors and Affiliations

  1. W-6 Detonator Technology, MS P950, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA

    Michael J. Murphy

  2. Laboratory for Energetic Flow and Turbulence, Department of Mechanical and Aerospace Engineering, Arizona State University, Tempe, AZ, 85287, USA

    Ronald J. Adrian

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  1. Michael J. Murphy
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  2. Ronald J. Adrian
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Correspondence to Michael J. Murphy.

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Murphy, M.J., Adrian, R.J. PIV space-time resolution of flow behind blast waves. Exp Fluids 49, 193–202 (2010). https://doi.org/10.1007/s00348-010-0843-y

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  • DOI: https://doi.org/10.1007/s00348-010-0843-y

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