Results 261 to 270 of about 9,648 (314)

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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Composite Materials in Propellers

Aircraft Engineering and Aerospace Technology, 1989
THE introduction of the pure jet gas turbine propelled aeroplane appeared to herald the demise of the propeller as a means of propulsion for other than small or specialised machines.
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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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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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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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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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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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Improvement of HNF and Propellant Characteristics of HNF-Based Composite Propellants

43rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference &amp; Exhibit, 2007
Nomenclature AP = ammonium perchlorate BRM = burning rate modifier BSR = bench scale reactor CSD = crystal size distribution ESA = European Space Agency HNF = hydrazinium nitroformate HNF-C = HNF recrystallised from HNF-P by cooling crystallisation HNF-P = HNF produced by precipitation HZ = hydrazine HZH = hydrazine hydrate L/D = length over diameter ...
Willianne Welland, Antoine van der Heijden, Stefano Cianfanelli, Lawrence Batenburg   +3 more
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