Reentry Vehicle
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Aerospace Vehicle Development Applications of Atmospheric Thermodynamic Inputs
ABSTRACT: Aerospace engineering has always had the need for various natural environment parameters to be used as inputs in research and engineering analyses used in the design and development of aircraft and launch/reentry vehicles. Although winds are indeed the main natural environment parameter used as inputs in vehicle design, the thermodynamic atmospheri
J. Aerosp. Technol. Manag.. Publicado em: 2014-03
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2. Pointing Algorithm for Reentry Orbit Injection with Uncontrolled Last Stage
Abstract: An essencial requirement for a launcher with uncontrolled last stage is to compute the ignition time of that stage and its attitude, in order to obtain a proper orbit transfer from a nonpropelled trajectory to a desired orbit, since such stage it cannot change its velocity profile and its direction. This article presents an algorithm that allows ac
J. Aerosp. Technol. Manag.. Publicado em: 2012-09
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3. Experimental results from the sounding vehicle Sonda III test campaign in the Pilot Transonic Wind Tunnel
Abstract: The Pilot Transonic Wind Tunnel of the Institute of Aeronautics and Space has conducted the first test campaign of a sounding vehicle, Sonda III. The campaign is part of a project whose activities and final results are presented in this paper. During the test campaign, many activities were performed to increase the productivity and accuracy of the
J. Aerosp. Technol. Manag.. Publicado em: 2011-12
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4. Computation of air chemical equilibrium composition until 30000K - Part I
Abstract An algorithm was developed to obtain the air chemical equilibrium composition. The air was considered to be composed of 79% N2 and 21% O2, and the models are 5 chemical species, N2, O2, NO, N, O, and 7 chemical species, N2, O2, NO, N, O, NO+, e-, respectively. The air chemical equilibrium composition is obtained through the equilibrium constants met
J. Aerosp. Technol. Manag.. Publicado em: 2011-08
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5. Numerical investigation of aerothermodynamic in a reentry vehicle with surface discontinuity-like cavity / Investigação numérica da aerotermodinâmica de veículos na reentrada com imperfeições na superficie do tipo cavidade
In the design of hypersonic vehicles, the knowledge of factors that affects the thermal and aerodynamic loads acting on the vehicle surface becomes imperative. Usually, in the thermal load calculations, the analysis assumes that the vehicle has a smooth surface. However, discontinuities or imperfections are present on the surface of reentry vehicles. In this
Publicado em: 2010
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6. Simulação direta molecular da influência de degraus na superfície de veículos na reentrada / Direct molecular simulation of step influence on a reentry vehicle surface
No projeto de veículos hipersônicos, o conhecimento dos fatores que afetam as cargas térmicas e aerodinâmicas que agem na superfície do veículo se torna imperativo. Usualmente, no cálculo das cargas térmicas, a análise assume que o veículo possui um contorno livre de imperfeições. No entanto, descontinuidades estão presentes na superfície de ve
Publicado em: 2009
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7. Simulação direta molecular da influência de degraus na superfície de veículos na reentrada / Direct molecular simulation of step influence on a reentry vehicle surface
No projeto de veículos hipersônicos, o conhecimento dos fatores que afetam as cargas térmicas e aerodinâmicas que agem na superfície do veículo se torna imperativo. Usualmente, no cálculo das cargas térmicas, a análise assume que o veículo possui um contorno livre de imperfeições. No entanto, descontinuidades estão presentes na superfície de ve
Publicado em: 2009
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8. Fragmentação por ação aerotermodinâmica e predição da área de impacto de um veículo espacial com injeção controlada da re-entrada / Aerothermodynamically-induced fragmentation and prediction of the area of impact of a space vehicle with controlled injection of the re-entry
Este trabalho consiste em estudar a fragmentação por ação aerotermodinâmica durante re-entrada de um veículo espacial, com estimativa da área de impacto dos fragmentos na superfície terrestre. Inicialmente, são realizadas manobras de decaimento orbital controlado através de transferências ótimas impulsivas. Tais impulsos são aplicados no sentido
Publicado em: 2009
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9. Aerothermodynamically-induced fragmentation and prediction of the area of impact of a space vehicle with controlled injection of the re-entry / Fragmentação por ação aerotermodinâmica e predição da área de impacto de um veículo espacial com injeção controlada da re-entrada
Este trabalho consiste em estudar a fragmentação por ação aerotermodinâmica durante re-entrada de um veículo espacial, com estimativa da área de impacto dos fragmentos na superfície terrestre. Inicialmente, são realizadas manobras de decaimento orbital controlado através de transferências ótimas impulsivas. Tais impulsos são aplicados no sentido
Publicado em: 2009
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10. Facilitation of glutamate receptors enhances memory.
A benzamide drug that crosses the blood-brain barrier and facilitates DL-alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptor-mediated synaptic responses was tested for its effects on memory in three behavioral tasks. The compound reversibly increased the amplitude and prolonged the duration of field excitatory postsynaptic potentials in