Studying the Formulation Effects on Steady-State and Transient Combustion Behavior of Aluminized Propellants

reportActive / Technical Report | Accession Number: ADA550046 | Open PDF

Abstract:

A new approach based on use of special super heterogeneous propellants that generate during combustion the model agglomerates with given reproducible size and structure has been elaborated for study of model agglomerate evolution. The experiments with agglomerates of 395540 micron size and initial aluminum content 42.6 were carried out in pressure range 1-80 atm. The characteristics of condensed combustion products CCP were measured via sampling technique at pressure 46 atm argon or nitrogen for 12 metalized propellant formulations manufactured using well characterized ingredients. All compositions were based on energetic binder 20. They included totally 18 aluminum commercial or ultra fine particles in various proportion and contained AP or AP and HMX as oxidizer. The replacement of commercial aluminum by electrically exploded aluminum Alex lead to increase of burning rate, decrease of agglomerate mass and increase of metal conversion completeness. All propellant formulation exhibited very effective aluminum conversion total unburnt aluminum content in CCP did not exceed 9. The listed trends are mostly expressed in combustion of HMX containing propellants and even small additive of Alex AlexAl 8.391.7 gives sizable effect. For oxide particles in the size range 0.5-100 microns the typical three-peak structure of mass size distribution was found. The replacement of aluminum by Alex and using argon instead of nitrogen affects slightly the CCP size distribution. Thermal decomposition of different types of the binders and mixtures modeling the pocket matter was investigated at low 10 Kmin and fast 450 Kmin heating rate. Data obtained are not sufficient to make clear the cause of difference in agglomeration behavior for propellant formulations based on these types of binders.

Author(s):
Zarko, Vladimir E. ; Glotov, O. G. ; Karasev, V. V. ; Simonenko, V. N. ; Kiskin, A. B. ; Svit, A. G. ; Gusachenko, L. K.
Author Organization(s):
RUSSIAN ACADEMY OF SCIENCES NOVOSIBIRSK INST OF CHEMICAL KINETICS AND COMBUSTION
Descriptive Note:
Final rept. 7 Sep 1998-7 Jun 1999
Supplementary Note:
Contract option period. See also ADA550043.
Pagination:
0100

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Contract/Grant Number(s):
F61708-97-W-0197
Monitor Series:
EOARD
 Subject Terms
Joint Capability Areas:
JCA_5.3_Planning; JCA_5_Command and Control; JCA_1.2.7_Experimentation; JCA_1.2.5_Lessons Learned; JCA_4.5.4_Requirements Definition; JCA_4.5_Operational Contract Support; JCA_1.2.3_Educating
Modernization Areas:
Microelectronics
Communities of Interest:
Weapons Technologies
Descriptor(s):
*ALUMINUM, *COMBUSTION, *SOLID ROCKET PROPELLANTS, AGGLOMERATES, ARGON, BINDERS, BURNING RATE, COMBUSTION PRODUCTS, CONVERSION, DISTRIBUTION, FORMULATIONS(CHEMISTRY), HMX, MASS, MIXTURES, NITROGEN, OXIDES, PARTICLE SIZE, PRESSURE, PYROLYSIS, RUSSIA, SAMPLING, ULTRAFINES
Field(s)/Group(s):
Combustion and Ignition, Solid Rocket Propellants
Keyword(s):
AGGLOMERATE EVOLUTION, AGGLOMERATION, ALUMINUM NITRIDE, ALUMINUM OXIDE, ALUMINUM COMBUSTION EFFICIENCY, BURNING PARTICLE MOTION, CONDENSED COMBUSTION PRODUCTS, DECOMPOSITION TEMPERATURE, DRAG COEFFICIENTS, ALEX(ELECTRO EXPLODED ALUMINUM), FAST THERMAL PYROLYSIS OF BINDER, PARTICLE DENSITY, PARTICLE SIZE DISTRIBUTION, SOLID PROPELLANTS, ULTRA FINE, FOREIGN REPORTS
Report Date:
1999 Jul 01
Creation Date:
2011 Nov 02