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

Journal Article · · Combustion and Flame
 [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

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.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States); Naval Air Warfare Center Weapons Division, China Lake, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC); Office of Naval Research (ONR) (United States)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1489493
Alternate ID(s):
OSTI ID: 1548021
Journal Information:
Combustion and Flame, Vol. 196; ISSN 0010-2180
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 16 works
Citation information provided by
Web of Science

References (19)

Correlating Aluminum Burning Times journal September 2005
Agglomeration and ignition mechanism of aluminum particles in solid propellants journal January 1979
Automatic particle sizing from rocket motor holograms conference May 1992
Aluminum Agglomeration in Solid-Propellant Combustion journal August 1984
Exploring mechanisms for agglomerate reduction in composite solid propellants with polyethylene inclusion modified aluminum journal March 2015
Coalescence of metal particles during the combustion of metallized ballistite compositions and fuel-oxidizer mixtures journal January 1970
Quantitative, three-dimensional imaging of aluminum drop combustion in solid propellant plumes via digital in-line holography journal January 2014
Diffusion flame calculations for composite propellants predicting particle-size effects journal May 2010
Investigation of the agglomeration of aluminum particles during the combustion of metallized composite condensed systems journal May 1985
Condensed Combustion Products at the Burning Surface of Aluminized Solid Propellant journal November 1999
Experimental investigation of the agglomeration of aluminum particles in burning condensed systems journal January 1981
Synchrotron X-ray techniques for fluid dynamics journal February 2014
The 7BM beamline at the APS: a facility for time-resolved fluid dynamics measurements journal May 2012
Properties of the surface layer and combustion behavior of metallized solid propellants journal July 2009
A pocket model for aluminum agglomeration in composite propellants journal May 1983
A Stochastic Pocket Model for Aluminum Agglomeration in Solid Propellants journal April 2009
New Aluminum Agglomeration Models and Their Use in Solid-Propellant-Rocket Simularions journal September 2005
Physicomathematical model of the agglomeration of aluminum in the combustion of mixed condensed systems journal January 1989
Modeling of the Agglomeration Phenomena in Combustion of Aluminized Composite Solid Propellant journal October 2013

Cited By (3)

Transformation of Combustion Nanocatalysts inside Solid Rocket Motor under Various Pressures journal March 2019
Single Particle Combustion of Pre-Stressed Aluminum journal May 2019
Tailoring Binder Melting Temperature to Study the Binder Melt Layer Flow in Ammonium Perchlorate Composite Propellants journal October 2019