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Title: Synchrotron-based measurement of aluminum agglomerates at motor conditions

Abstract

Solid rocket propellant combustion is hindered by agglomeration of aluminum particles on its burning surface and determining the particle size has been a problem for half a century. The actual size of the agglomerates at motor pressures is unknown due to the opacity of the combustion plume, particularly at the elevated pressures seen in operational rocket motors. Sampling techniques can provide data at elevated pressure but may be biased due to the sampling method and do not provide information on the dynamics of agglomerate formation. Here this study uses time-resolved synchrotron x-ray imaging (with both absorption and phase contrast) to view aluminum agglomerate formation in situ at relevant rocket pressures. Finally, we have for the first time observed agglomerate formation at motor-relevant pressures in real time with unprecedented fidelity, providing critical data for understanding the combustion of aluminized solid rocket propellants.

Authors:
 [1]; ORCiD logo [1];  [2];  [3];  [3]
  1. Naval Air Warfare Center Weapons Division, China Lake, CA (United States). Combustion Sciences and Propulsion Research Branch
  2. Univ. of Southern California, Los Angeles, CA (United States). Keck School of Medicine
  3. Argonne National Lab. (ANL), Argonne, IL (United States). X-ray Sciences Division. Advanced Photon Source
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States); Naval Air Warfare Center Weapons Division, China Lake, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC); Office of Naval Research (ONR) (United States)
OSTI Identifier:
1489493
Alternate Identifier(s):
OSTI ID: 1548021
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Combustion and Flame
Additional Journal Information:
Journal Volume: 196; Journal ID: ISSN 0010-2180
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 42 ENGINEERING; synchrotron; propellant; aluminum agglomeration; combustion diagnostic

Citation Formats

Kalman, Joseph, Demko, Andrew R., Varghese, Bino, Matusik, Katarzyna E., and Kastengren, Alan L. Synchrotron-based measurement of aluminum agglomerates at motor conditions. United States: N. p., 2018. Web. doi:10.1016/j.combustflame.2018.06.013.
Kalman, Joseph, Demko, Andrew R., Varghese, Bino, Matusik, Katarzyna E., & Kastengren, Alan L. Synchrotron-based measurement of aluminum agglomerates at motor conditions. United States. doi:10.1016/j.combustflame.2018.06.013.
Kalman, Joseph, Demko, Andrew R., Varghese, Bino, Matusik, Katarzyna E., and Kastengren, Alan L. Wed . "Synchrotron-based measurement of aluminum agglomerates at motor conditions". United States. doi:10.1016/j.combustflame.2018.06.013. https://www.osti.gov/servlets/purl/1489493.
@article{osti_1489493,
title = {Synchrotron-based measurement of aluminum agglomerates at motor conditions},
author = {Kalman, Joseph and Demko, Andrew R. and Varghese, Bino and Matusik, Katarzyna E. and Kastengren, Alan L.},
abstractNote = {Solid rocket propellant combustion is hindered by agglomeration of aluminum particles on its burning surface and determining the particle size has been a problem for half a century. The actual size of the agglomerates at motor pressures is unknown due to the opacity of the combustion plume, particularly at the elevated pressures seen in operational rocket motors. Sampling techniques can provide data at elevated pressure but may be biased due to the sampling method and do not provide information on the dynamics of agglomerate formation. Here this study uses time-resolved synchrotron x-ray imaging (with both absorption and phase contrast) to view aluminum agglomerate formation in situ at relevant rocket pressures. Finally, we have for the first time observed agglomerate formation at motor-relevant pressures in real time with unprecedented fidelity, providing critical data for understanding the combustion of aluminized solid rocket propellants.},
doi = {10.1016/j.combustflame.2018.06.013},
journal = {Combustion and Flame},
number = ,
volume = 196,
place = {United States},
year = {2018},
month = {6}
}

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