Results 191 to 200 of about 888 (231)
International Journal of Thermal Sciences, 2016 International audienceThe thermal response of an unprotected structural steel element exposed to a solid rocket propellant fire is investigated. A 2 kg aluminized composite propellant Butalane (R) is positioned onto a 5 mm steel plate and ignited with a ...
B Porterie
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Intermetallic Compounds as Fuels for Composite Rocket Propellants
47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2011Aluminized composite propellants have long suffered from efficiency and thermal challenges related to production of condensed phase slag droplets during operation. In an effort to mitigate the production of large droplets, a mechanically activated intermetallic forming nickel-aluminum compound was substituted for a portion of a propellant’s aluminum ...
David Reese +3 more
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Integrated model of a composite propellant rocket
AIP Conference Proceedings, 2016The combustion of composite solid propellants was investigated and an available numerical model was improved for taking into account the change of pressure, when the process occurs in a confined environment, as inside a rocket. The pressure increase upon ignition is correctly described by the improved model for both sandwich and dispersed particles ...
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Bonding of composite propellant in cast-in-case rocket motors.
Journal of Spacecraft and Rockets, 1966The apparent bond strength of some composite solid-rocket propellants to elastomeric substrates is governed by the propellant cohesive strength. When these propellants are tested (whether by the tensile or peel method), failure is invariably cohesive within the propellant near the interface.
CLARENCE GUSTAVSON +2 more
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Thermostructural composite materials for liquid propellant rocket engines
23rd Joint Propulsion Conference, 1987Since more than twenty years the possible utilisation of high temperature and oxydation resistance of ceramics was considered by rocket engines designers but brittleness and poor thermal choc resistance was a major disadvantage for those materials emergence.
A. MELCHIOR, M. POULIQUEN, E. SOLER
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Burning rate of a trimodal composite rocket propellant
Journal of Propulsion and Power, 1990Some new perceptions in the field of composite propellants are considered. The effects of trimodal oxidizer distribution on the burning rate of composite propellants are considered. It is note that reducing the oxidizer particles in the presence of depressors reduces the burning rate of these propellants. In the formulation of the experimental approach,
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Isocyanate‐Free and Dual Curing of Smokeless Composite Rocket Propellants
Propellants, Explosives, Pyrotechnics, 2012AbstractTraditional composite rocket propellants are cured by treatment of hydroxyl‐terminated prepolymers with polyfunctional aliphatic isocyanates. For development of smokeless composite propellants containing nitramines and/or ammonium dinitramide (ADN), energetic binder systems using glycidyl azide polymer (GAP) are of particular interest ...
Eva Landsem +5 more
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Microstructural damage and fracture processes in a composite solid rocket propellant
Journal of Spacecraft and Rockets, 1995A study has been made of the microstructural damage and fracture processes associated with the fracturetoughness behavior of a polymer-matrix composite solid rocket-propellant material. Specifically, nonlinear-elastic fracture-mechanics tests were performed, as a function of displacement rate and temperature (—54 to 71°C), on center-cracked sheet test ...
C. D. Bencher +2 more
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Effects of Dual Oxidizers on the Properties of Composite Solid Rocket Propellants
2016The microstructures and granular distribution of different oxidizers (AP, HMX, CL-20, GUDN, and ADN) were investigated. Several industrial and research types of hydroxyl-terminated polybutadiene (HTPB)-based composite solid rocket propellants containing different dual oxidizers (with a fraction of AP in the reference formulation replaced by HMX, CL-20,
Wei Qiang Pang +5 more
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Generating Plateau Burning Segments for Composite Solid Rocket Propellants
Propellants, Explosives, Pyrotechnics, 2019AbstractPlateau burning is a highly desired phenomenon for composite solid rocket propellants. Three composite propellant compositions were prepared in an attempt to generate plateau burning segments. In these compositions the curative type was changed along with controlling the coarse to fine ratio of the oxidizer particles.
Sameh A. El‐Basuony +3 more
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