Results 211 to 220 of about 1,068 (265)

Oscillatory burning of solid composite propellants

Symposium (International) on Combustion, 1963
Analytical consideration of the interaction of an oscillatory pressure disturbance with the burning zone of a composite propellant leads to the conclusion that acoustic waves induce periodic variations in the ratio of the mass release rates of composite propellant components that give rise to harmonic composition and adiabatic flame temperature ...
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Modelling of composite propellant properties

36th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, 2000
State-of-the-art composite propellants are based on solid particles (AP, Aluminium) in a polymeric HTPB based binder system. The usability of a propellant for a particular application is dependent on a large number of properties. These different properties sometimes result in contradictory requirements and design trade-off need to be made.
Keizers, H.L.J., Hordijk, A.C., Vliet, L.D. van, Bouquet, F.   +3 more
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Integrated model of a composite propellant rocket

AIP Conference Proceedings, 2016
The 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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A model of erosive burning of composite propellants

13th Propulsion Conference, 1977
Abstract : Development of solid rocket motor designs which result in high velocity flows of product gases across burning propellant surfaces(notably, nozzleless rocket motors) is leading to increased occurrence of erosive burning. In this paper, a physically realistic picture of the effect of such crossflow on composite propellant combustion, based on ...
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Optimized Design of Composite Propeller

Mechanics of Advanced Materials and Structures, 2004
ABSTRACT Traditional propellers are made of high-stiffness metal material. They deform only slightly and are usually designed to work at a constant speed, operating at reduced efficiency at other speeds. This research designs a composite propeller that operates over a wider range of speeds.
Lee, Y. J., Lin, C. C.
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Numerical modeling of composite propellant combustion

Symposium (International) on Combustion, 1998
An innovative 2-D numerical model of composite propellant combustion is proposed. It takes into acount the detailed description of the propellant topology, five chemical reactions, gas molecular diffusion, and heat transfer in the gas phase. Partial differential equations are numerically solved introducing a topological matrix.
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COMBUSTION OF COMPOSITE PROPELLANTS WITH TITANIUM

Journal of Applied Mechanics and Technical Physics, 2023
N. S. Belousova, O. G. Glotov, I. V. Sorokin   +2 more
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Development of an Aircraft Composite Propeller

SAE Technical Paper Series, 1979
<div class="htmlview paragraph">The current aircraft noise regulations effected the design of propellers where tip speeds were reduced to meet these regulations. Reduced tip speeds were accomplished by reducing propeller rpm and/or propeller diameter.
W. B. Harlamert, R. Edinger
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Modelling of Composite-Propellant Flames

2001
Abstract : We examined small deviations from axial symmetry in a solid-propellant rocket motor, and describe a 'bath-tub-vortex' effect, in which substantial axial vorticity is generated in a neighborhood of the chamber centerline. The unperturbed flow field is essentially inviscid at modest Reynolds numbers, even at the chamber walls, as has long been
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Simulation of Composite Propellant Aging

Polymer-Plastics Technology and Engineering, 1993
Abstract Inert polyurethane (PU)-glass elastomeric composites were fabricated to simulate the mechanical behavior of composite propellant systems. A polyether PU system was used in conjunction with 60 wt%, 20 μm glass beads. The mechanical and interfacial properties of model systems were evaluated as a function of time and temperature, using Instron ...
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