Buscar
Mostrando ítems 51-60 de 1596
New data on the humerotriceps of penguins and its implications in the evolution of the fossa tricipitalis
(Taylor and Francis Ltd., 2017-11)
A paddle-shaped wing, the general morphology of the humerus, and the muscles involved in wing movement are among the most characteristic adaptations to diving in penguins. Particularly, the humeral fossa tricipitalis and ...
Desenvolvimento de produto: apresentação de um método de prototipagem de hélices na área de geração de energia eólica
(Universidade Federal de Santa MariaCentro de Tecnologia, 2014-01-08)
Product development is one of the key processes to maintaining the competitiveness of a company nowadays, if well organized and structured environment. For this, we use a reference model, responsible for standardization ...
Optimizing propeller performance: a comprehensive constrained multi-objective design approach using blade element theory and evolutionary algorithms
(Universidade Federal de Juiz de Fora (UFJF)BrasilICE – Instituto de Ciências ExatasPrograma de Pós-graduação em Modelagem ComputacionalUFJF, 2023)
Interferometric method for specific impulse determination
(Society of Photo-Optical Instrumentation Engineers, 2018-09)
One of the main figures of merit in laser-ablative propulsion is the specific impulse, Isp, defined as the impulse per unit weight of fuel, and it is related to the exhaust velocity, ve, by the acceleration of gravity, Isp ...
Análise de desempenho de motores elétricos em túnel de vento
(Universidade Federal do Rio Grande do NorteBrasilUFRNEngenharia MecânicaDepartamento de Engenharia Mecânica, 2022-02-16)
Every year, the teams that participate in the SAE BRASIL AeroDesign competition
are instigated to find solutions to certain challenges imposed by the organization through
a regulation. The design of each aircraft differs ...
Thermal degradation of a composite solid propellant examined by DSC - Kinetic study
(Kluwer Academic Publ, 2004-01-01)
The thermal decomposition of ammonium perchlorate (AP)/hydroxyl-terminated-polybutadiene (HTPB), the AP/HTPB solid propellant, was studied at different heating rates in dynamic nitrogen atmosphere. The exothermic reaction ...
Diseño de hélices para micro UAVs de bajo ruido
(Universidad de los AndesIngeniería MecánicaFacultad de IngenieríaDepartamento de Ingeniería Mecánica, 2020)
"Se analizaron tres estrategias para la reducción de ruido emitido por micro UAVs y su implementación en el diseño geométrico de la hélice. Se estudiaron las estrategias de reducción de velocidad en punta, ángulo de flecha ...
TG studies of a composite solid rocket propellant based on HTPB-binder
(Kluwer Academic Publ, 2004-01-01)
Thermal decomposition kinetics of solid rocket propellants based on hydroxyl-terminated polybutadiene-HTPB binder was studied by applying the Arrhenius and Flynn-Wall-Ozawa's methods. The thermal decomposition data of the ...