Flash x-ray measurements of shock wave interactions with dense particle fields

Justin L. Wagner, Sean P. Kearney, Steven J. Beresh, Brian O. Pruett, Elton K. Wright, Gerald C. Stoker

Research output: Contribution to conferencePaperpeer-review

Abstract

A flash x-ray imaging system has been used to make volume fraction measurements during the interaction of a Mach 1.66 planar shock wave with a dense gas-solid field of particles. The particle field was generated by a gravity-fed method that resulted in a spanwise parallel curtain of 100-micron particles having a volume fraction of about 20%. During the first 280 microseconds of the interaction, the peak volume fraction decreased from about 22% to about 5%. With increasing time, the field propagated downstream and spread in an asymmetric fashion with a steeper gradient in volume fraction on the downstream side of the field compared to the upstream side. Bias errors associated with geometric distortion were identified and techniques to minimize them were discussed. X-ray velocimetry methods were evaluated using sample tracer particle images. X-ray particle image velocimetry was shown to be feasible for particle fields having a thin spanwise dimension, but to make measurements in a curtain of substantial spanwise thickness, a one-component, volumetric x-ray particle tracking velocimetry technique is suggested.

Original languageEnglish (US)
DOIs
StatePublished - 2012
Externally publishedYes
Event50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition - Nashville, TN, United States
Duration: Jan 9 2012Jan 12 2012

Other

Other50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition
Country/TerritoryUnited States
CityNashville, TN
Period1/9/121/12/12

ASJC Scopus subject areas

  • Aerospace Engineering

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