@MastersThesis{Fischer:2014:InCeDu,
author = "Fischer, Gustavo Alexandre Achilles",
title = "Injetores centr{\'{\i}}fugos duais e jato-centr{\'{\i}}fugos
para aplica{\c{c}}{\~a}o em propuls{\~a}o de foguetes",
school = "Instituto Nacional de Pesquisas Espaciais (INPE)",
year = "2014",
address = "S{\~a}o Jos{\'e} dos Campos",
month = "2014-02-25",
keywords = "injetor centr{\'{\i}}fugo dual, injetor
jato-centr{\'{\i}}fugo, atomiza{\c{c}}{\~a}o, propuls{\~a}o,
dual swirl injectors, jet-swirl injectors, atomization,
propulsion.",
abstract = "Esse trabalho apresenta uma investiga{\c{c}}{\~a}o
te{\'o}rico-experimental de injetores centr{\'{\i}}fugos duais
e jato-centr{\'{\i}}fugos para utiliza{\c{c}}{\~a}o em
propulsores bipropelentes l{\'{\i}}quidos. Esses tipos de
injetores proporcionam atomiza{\c{c}}{\~a}o e mistura eficiente
dos propelentes, al{\'e}m de permitirem o ajuste do {\^a}ngulo
de cone do \emph{spray} para uma dada queda de press{\~a}o ou
vaz{\~a}o, reduzindo as dimens{\~o}es da c{\^a}mara de
combust{\~a}o. Inicialmente s{\~a}o apresentadas as teorias de
Abramovich e Kliachko usadas na an{\'a}lise do escoamento interno
e o projeto de injetores centr{\'{\i}}fugos duais. Uma nova
metodologia {\'e} desenvolvida para an{\'a}lise e projeto de
injetores jato-centr{\'{\i}}fugos, baseada na abordagem de
Bayvel e Orzechowski e na teoria de Kliachko. A nova metodologia
pode tamb{\'e}m ser aplicada ao projeto de injetores
centr{\'{\i}}fugos simples e duais. Em seguida, s{\~a}o
projetados e fabricados injetores seguindo os novos procedimentos
de c{\'a}lculo propostos, visando emprego de um {\'u}nico
injetor em um propulsor bipropelente a etanol
(\$C_{2}\$\$H_{5}\$O) 95\% m/m e per{\'o}xido de
hidrog{\^e}nio (\$H_{2}\$\$O_{2}\$) 90\% m/m com empuxo de
100 N. Foram estudadas as caracter{\'{\i}}sticas da
atomiza{\c{c}}{\~a}o dos injetores utilizando {\'a}gua e etanol
como fluidos de teste, com a ajuda de uma bancada de testes a frio
especialmente desenvolvida para esta pesquisa. Os coeficientes de
descarga, os di{\^a}metros representativos de gotas, as
distribui{\c{c}}{\~o}es dos tamanhos de gotas, os {\^a}ngulos
de cone dos sprays e as vaz{\~o}es m{\'a}ssicas dos propelentes
foram determinados para diferentes press{\~o}es de
inje{\c{c}}{\~a}o. Tendo em vista reduzir o tamanho m{\'e}dio
das gotas formadas, foi apresentado o projeto preliminar de um
cabe{\c{c}}ote de inje{\c{c}}{\~a}o com cinco injetores
centr{\'{\i}}fugos duais centrais e oito injetores
centr{\'{\i}}fugos simples perif{\'e}ricos. ABSTRACT: This
thesis presents a theoretical and experimental investigation of
dual swirl and jet-swirl injectors for use in bipropellants
thrusters. These types of injectors provide efficient atomization
and mixing of propellants. They also allow the adjustment of the
spray cone angle for a given pressure drop or flow rate, reducing
the dimensions of the combustion chamber. Initially, the
Abramovich and Kliachko theories were presented for analysis of
the internal flow and design of dual pressure swirl injectors. A
new methodology was developed for analysis and design of jet-swirl
injectors, based on Bayvel and Orzechowski approaches and Kliachko
theory. Next, injectors were designed and manufactured following
the new proposed methodology, aiming utilization of a single
injector in a bipropellant rocket engine using ethanol
(\$C_{2}\$\$H{5}\$O) and hydrogen peroxide
(\$H_{2}\$\$O_{2}\$) to yield 100 N thrust. This new
methodology can be also applied to design of single and dual
pressure swirl injectors. Next, injectors were designed and
manufactured following the new proposed methodology, aiming
utilization of a single injector in a bipropellant rocket engine
using ethanol (\$C_{2}\$\$H_{5}\$O) 95\% m/m and hydrogen
peroxide (\$H_{2}\$\$O_{2}\$) 90\% m/m to yield 100 N thrust.
The atomization characteristics of the injectors were studied
using water and ethanol as test fluids, with a test bench for cold
tests specially developed for this research. Discharge
coefficients, representative drop diameters, drop size
distributions, spray cone angles, and mass flow rates were
determined for different injection pressures. Considering the
large average drop diameters observed using a single injector, the
preliminary design of an injection plate with five central dual
swirl injectors and eight peripherical single swirl injectors was
presented.",
committee = "Costa, Fernando de Souza (presidente/orientador) and Dourado,
Wladimyr Mattos da Costa and Lacava, Pedro Teixeira",
englishtitle = "Dual swirl and jet-swirl injectors for application in rocket
propulsion",
language = "pt",
pages = "266",
ibi = "8JMKD3MGP7W/3FMU43L",
url = "http://urlib.net/ibi/8JMKD3MGP7W/3FMU43L",
targetfile = "publicacao.pdf",
urlaccessdate = "20 maio 2024"
}