Results 211 to 220 of about 914 (263)
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8th Joint Propulsion Specialist Conference, 1972
Abstract : The experimental results at 100 bar initial pressure emphasize the importance of the condensed phase properties on the depressurization extinguishment. In all cases of alteration of these properties by the change of binder, the particle size distribution, or the addition of Aluminum the critical depressurization rate for extinguishment was ...
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Abstract : The experimental results at 100 bar initial pressure emphasize the importance of the condensed phase properties on the depressurization extinguishment. In all cases of alteration of these properties by the change of binder, the particle size distribution, or the addition of Aluminum the critical depressurization rate for extinguishment was ...
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The combustion of solid monopropellants and composite propellants
Symposium (International) on Combustion, 1971A model describing the combustion of composite propellants has been applied to three different types of composite propellants, and to two oxidizers which burn as monopropellants. The oxidizers studied are AP, HMX, and KP (ammonium perchlorate, cyclotetramethylenetetranitramine, and potassium perchlorate), each of which has unique combustion ...
M.W. Beckstead, R.L. Derr, C.F. Price
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Erosive burning of composite solid propellants
Combustion and Flame, 1966A model is proposed for erosive burning of ammonium perchlorate composite wolid propellants. It is assumed that combustion takes place in the turbulent boundary layer and that the turbulent flame consists of distorted ‘flamelets’ but otherwise retains on a molecular scale the characteristics of a laminar flame.
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Nanomaterials as modifier for composite solid propellants
Nano-Structures & Nano-Objects, 2019Abstract Propellants are the major source of chemical energy in space vehicles and missiles. The AP (Ammonium perchlorate), AN (Ammonium nitrate), RDX (Hexahydro-1, 3, 5-trinitri-1, 3, 5-triazine) and HMX (Octahydro-1, 3, 5, 7-tetranitro-1, 3, 5, 7- tetrazocine), etc are currently the most widely used energetic materials in composite solid ...
Jalpa A. Vara +2 more
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Calorimetric values of composite solid propellants
Thermochimica Acta, 1982The calorimetric values of composite solid propellant based on polystyrene, polyphenolformaldehyde, poly(vinyl chloride) and carboxy-terminated polybutadiene were determined using combustion calorimetry in order to assess the uncertainities in their measurements.
Kishore, K +2 more
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Nitramine composite solid propellant modeling
26th Joint Propulsion Conference, 1990Abstract : This report summarizes work performed at the Naval Weapons Center to develop a theoretical model for the combustion of nitramine composite solid propellants.
F. BLOMSHIELD, J. OSBORN
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Some properties of a composite solid propellant.
2009Temperature profiles during polymerization, for the infinite solid cylinder, the infinite hollow cylinder and the star perforated infinite cylinder of polyurethane ammonium perchlorate solid propellent, have been determined. They show that the temperature across the solid rises considerably above the wall temperature and exceeds the 60°C (140°F) limit,
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Control of pressure deflagration limits of composite solid propellants
2nd Propulsion Joint Specialist Conference, 1966The pressure below which solid-propellant combustion cannot occur is an important parameter influencing the behavior of extinguishable motors. Permanent extinguishment can be effected by arranging the motor parameters so that no equilibrium chamber pressure is available above this combustion threshold pressure.
JOHN A. PETERSON +2 more
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Convective ignition of a granular solid propellant bed: Influence of propellant composition
Symposium (International) on Combustion, 1996In previous work, the authors designed and built a laboratory apparatus that subjects a confined bed of granular propellant to essentially a planar hot-gas ignition wave. Diagnostics include wall-mounted pressure transducers to monitor the time history of the pressure field, and fast-response thermocouples protected within custom sting-mounted steel ...
Douglas E. Kooker +2 more
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Some Experiments on Model Composite Solid Propellants
Propellants, Explosives, Pyrotechnics, 1983AbstractExperiments on two‐dimensional model propellants using cylindrical oxidizer (ammonium perchlorate) pellets in a fuel matrix (CTPB) are described. Measurements show that burning rate of AP in the fuel environment is lower than of pure AP. The oxidizer‐to‐fuel ratio seems to be fuel‐rich when the oxidizer particles are imbedded in contact with ...
Ramaprasad, PR +2 more
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