Schlieren
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. Visual Experimental and Numerical Investigations around the VLM-1 Microsatellite Launch Vehicle at Transonic Regime
ABSTRACT: It is performed and presented an experimental and numerical investigation over the flow patterns around the fore-body section of a microsatellite launch vehicle in development at Instituto de Aeronáutica e Espaço. The experimental investigation with a VLM-1 model in 1:50 scale is carried out at the Brazilian Pilot Transonic Wind Tunnel, located i
J. Aerosp. Technol. Manag.. Publicado em: 2017-06
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2. Experimental results of a Mach 10 conical-flow derived waverider to 14-X hypersonic aerospace vehicle
Abstract This paper presents a research in the development of the 14-X hypersonic airspace vehicle at Institute for Advanced Studies (IEAv) from Department of Science and Aerospace Technology (DCTA) of the Brazilian Air Force (FAB). The 14-X project objective is to develop a higher efficient satellite launch alternative, using a Supersonic Combustion Ramjet
J. Aerosp. Technol. Manag.. Publicado em: 2011-08
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3. Experimental analyisis of a hypersonic waverider.
This work presents the results of shock tunnel tests of a Mach 10 waverider with sharp leading edges. The waverider surface was generated from a conical flowfield with the volume and the viscous lift-to-drag ratio as optimization parameters. A compression and expansion ramps were added to the pure waverider surface in order to simulate the flow over a scramj
Publicado em: 2009
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4. Investigação da combustão supersônica em túnel de choque hipersônico.
Vários centros de pesquisa estão desenvolvendo novos veículos aeroespaciais utilizando tecnologias propulsivas avançadas. Estato-reator a combustão supersônica (scramjet) é a tecnologia propulsiva que apresenta maior potencial dentre as tecnologias em estudo. Scramjets transportam apenas o combustível, normalmente hidrogênio, utilizando o ar atmosf�
Publicado em: 2009
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5. Geochemistry and petrogenesis of post-collisional ultrapotassic syenites and granites from southernmost Brazil: the Piquiri Syenite Massif
O Maciço Sienítico Piquirí, situado no extremo sul do Brasil, é parte do magmatismo pós-colisional neoproterozóico relacionado ao Ciclo Brasiliano-Pan-Africano. O maciço tem em torno de 12 km de diâmetro e é composto de sienitos, granitos, rochas monzoníticas e lamprófiros. Diopsídio-flogopita, diopsídio-biotita-augita- anfibólio cálcico são
Anais da Academia Brasileira de Ciências. Publicado em: 2008-06
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6. Investigação Experimental da Adição de Energia por Laser em Escoamento Hipersônico de Baixa Densidade
The possibility of reducing the aerodynamic drag and heating of a hypersonic vehicle by addition energy to the air ahead of it is an attractive idea directed toward the hypersonic field. (Mach>5) and can be realized by laser induced plasma generation. In this context, this work presents original results in the experimental investigation of the energy addi
Publicado em: 2008
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7. Estudo experimental da evaporação de jatos de iso-octano superaquecido. / Experimental study of evaporating jets of superheated iso-octane.
The main goal of this thesis is to present results of experiments with flashing liquid jets of iso-octane. The experiments were carried out with a liquid jet issuing from a small nozzle into a low-pressure chamber. High degrees of metastability were obtained as the liquid jet expanded within the nozzle. Injection pressure and temperature were controlled to t
Publicado em: 2005
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8. Phosphorus fractionation in plant materials exploiting procedures for sample preparation and monosegmented flow analysis / Fracionamento de fósforo em plantas empregando diferentes procedimentos de preparo de amostras e sistemas de análise em fluxo monossegmentado
In this work, different sample treatment procedures were evaluated for fractionation of phosphorous in plant material (determination of organic and inorganic, soluble and insoluble fractions). The evaluated procedures aimed the conversion of different fractions in ortophosphate, minimizing time, reagent amounts and waste generation. It was developed a monose
Publicado em: 2005
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9. Geologia, petrografia e geoquimica de duas suites TTG do dominio norte do complexo campos gerais, sudoeste de Minas Gerais
South of Passos and Alpinópolis, in the southwestem region of Minas Gerais, there are at least two tonalitetrondhjemite-granodiorite suites (TIG) associated with the Morro do Ferro Greenstone Belt that is a part of the northern domain of the Campos Gerais Complex (CCG). The two TTG suítes studied here belong to the Serra do Dondó and Córrego das Almas be
Publicado em: 2004
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10. Evolução estrutural e petrogenetica do Domo granodioritico de Ambrosio, Bahia : implicações para o mecanismo de colocação
O Domo de Ambrósio corresponde a um corpo elíptico com 40 Km de comprimento na direção N-S e largura variável que pode atingir até 8 Km. Este pluton encontra-se encaixado na seqüência vulcano-sedimentar paleoprotorezóica do Greenstone Belt do Rio ltapicuru. Trabalhos de mapeamento litoestrutural no domo permitiu a identificação de três suites íg
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/11/2000
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11. Visualização e caracterização de campos ultra-sônicos via óptica de schlieren
Neste trabalho aplicamos um método óptico sensível e de baixo custo denominado ‘Schlieren’ para visualização e caracterização de feixes ultra-sônicos em solução aquosa. Esta caracterização assume papel importante na Medicina para diagnóstico não invasivo via método ultra-sônico.
Eclética Química. Publicado em: 2000
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12. Studies of Lp-Lipoprotein as a Quantitative Genetic Trait*
Sera from 11 individuals which were classified as Lp(a-) by direct gel diffusion and by absorption tests showed the presence of Lp(a) lipoprotein when the sera were concentrated 120-fold. This Lp(a) antigen was demonstrated by gel diffusion to be indistinguishable from Lp-lipoprotein isolated from known Lp(a+) sera. The Lp(a) preparations from sera classifie