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Title: Flash X-Ray measurements on the shock-induced dispersal of a dense particle curtain

Abstract

The interaction of a Mach 1.67 shock wave with a dense particle curtain is quantified using flash radiography. These new data provide a view of particle transport inside a compressible, dense gas–solid flow of high optical opacity. The curtain, composed of 115-µm glass spheres, initially spans 87 % of the test section width and has a streamwise thickness of about 2 mm. Radiograph intensities are converted to particle volume fraction distributions using the Beer–Lambert law. The mass in the particle curtain, as determined from the X-ray data, is in reasonable agreement with that given from a simpler method using a load cell and particle imaging. Following shock impingement, the curtain propagates downstream and the peak volume fraction decreases from about 23 to about 4 % over a time of 340 µs. The propagation occurs asymmetrically, with the downstream side of the particle curtain experiencing a greater volume fraction gradient than the upstream side, attributable to the dependence of particle drag on volume fraction. Bulk particle transport is quantified from the time-dependent center of mass of the curtain. Furthermore, the bulk acceleration of the curtain is shown to be greater than that predicted for a single 115-µm particle in a Machmore » 1.67 shock-induced flow.« less

Authors:
 [1];  [1];  [1];  [1];  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1237675
Report Number(s):
SAND-2015-5724J
Journal ID: ISSN 0723-4864; 597085
Grant/Contract Number:  
AC04-94AL85000
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Experiments in Fluids
Additional Journal Information:
Journal Volume: 56; Journal Issue: 12; Journal ID: ISSN 0723-4864
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; dispersal; shock tube; particles; dense; interaction; cloud; volume fraction; X-ray; radiography

Citation Formats

Wagner, Justin L., Kearney, Sean P., Beresh, Steven J., DeMauro, Edward Paisley, and Pruett, Brian Owen Matthew. Flash X-Ray measurements on the shock-induced dispersal of a dense particle curtain. United States: N. p., 2015. Web. doi:10.1007/s00348-015-2087-3.
Wagner, Justin L., Kearney, Sean P., Beresh, Steven J., DeMauro, Edward Paisley, & Pruett, Brian Owen Matthew. Flash X-Ray measurements on the shock-induced dispersal of a dense particle curtain. United States. doi:10.1007/s00348-015-2087-3.
Wagner, Justin L., Kearney, Sean P., Beresh, Steven J., DeMauro, Edward Paisley, and Pruett, Brian Owen Matthew. Mon . "Flash X-Ray measurements on the shock-induced dispersal of a dense particle curtain". United States. doi:10.1007/s00348-015-2087-3. https://www.osti.gov/servlets/purl/1237675.
@article{osti_1237675,
title = {Flash X-Ray measurements on the shock-induced dispersal of a dense particle curtain},
author = {Wagner, Justin L. and Kearney, Sean P. and Beresh, Steven J. and DeMauro, Edward Paisley and Pruett, Brian Owen Matthew},
abstractNote = {The interaction of a Mach 1.67 shock wave with a dense particle curtain is quantified using flash radiography. These new data provide a view of particle transport inside a compressible, dense gas–solid flow of high optical opacity. The curtain, composed of 115-µm glass spheres, initially spans 87 % of the test section width and has a streamwise thickness of about 2 mm. Radiograph intensities are converted to particle volume fraction distributions using the Beer–Lambert law. The mass in the particle curtain, as determined from the X-ray data, is in reasonable agreement with that given from a simpler method using a load cell and particle imaging. Following shock impingement, the curtain propagates downstream and the peak volume fraction decreases from about 23 to about 4 % over a time of 340 µs. The propagation occurs asymmetrically, with the downstream side of the particle curtain experiencing a greater volume fraction gradient than the upstream side, attributable to the dependence of particle drag on volume fraction. Bulk particle transport is quantified from the time-dependent center of mass of the curtain. Furthermore, the bulk acceleration of the curtain is shown to be greater than that predicted for a single 115-µm particle in a Mach 1.67 shock-induced flow.},
doi = {10.1007/s00348-015-2087-3},
journal = {Experiments in Fluids},
issn = {0723-4864},
number = 12,
volume = 56,
place = {United States},
year = {2015},
month = {11}
}

Journal Article:
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