Results 111 to 120 of about 1,005 (167)

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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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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Evaluation of Composite Mold for Small Composite Propeller

Transactions of the Korean Society of Mechanical Engineers A, 2013
The feasibility of substituting a composite mold for an aluminum mold in the fabrication of a small ship propeller was investigated. A small three-blade aluminum propeller was used as a plug for manufacturing the composite mold. A GRPG composite mold and propeller were made from an unsaturated polyester resin, Epovia gelcoat, and woven and mat glass ...
Pham Thanh Nhut, Young Jin Yum
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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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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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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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Fracture energies of composite propellants

Journal of Applied Polymer Science, 1977
Three types of fracture energies, i.e., for initiation, propagation, and the work of fracture, were measured for an ammonium perchlorate/polybutadiene composite propellant. The testing employed the “trouser leg” specimen configuration. The effect of an accelerated again process on these energy values was also investigated, showing that such a process ...
G. Marom, H. Harel, J. Rosner
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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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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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