Results 221 to 230 of about 956,080 (280)

HNF/HTPB BASED COMPOSITE PROPELLANTS

International Journal of Energetic Materials and Chemical Propulsion, 2002
In a search for new storable high performance propellants for the European Space Agency (ESA), the solid oxidiser Hydrazinium Nitroformate (HNF) was identified as a very promising ingredient for a new storable composite propellant. Two distinct advantages of HNF based propellants over presently used Ammonium Perchlorate (AP) based propellants rvere the
Heijden, A.E.D.M. van der, Keizers, H.L.J., Veltmans, W.H.M.   +2 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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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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