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Navegando por Autor "FAVACHO, Breno Inglis"

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    Contribution to the marine propeller hydrodynamic design for small boats in the Amazon region
    (Instituto Nacional de Pesquisas da Amazônia, 2016-03) FAVACHO, Breno Inglis; VAZ, Jerson Rogério Pinheiro; MESQUITA, André Luiz Amarante; LOPES, Fábio; MOREIRA, Antonio Luciano Seabra; SOEIRO, Newton Sure; ROCHA, Otávio Fernandes Lima da
    In the Amazon, river navigation is very important due to the length of navigable rivers and the lack of alternative road networks. Boats usually operate in unfavorable conditions, since there is no hydrodynamic relation among propellers, geometry, and the dimensions of the boat hull. Currently, there is no methodology for propeller hydrodynamic optimization with low computational cost and easy implementation in the region. The aim of this work was to develop a mathematical approach for marine propeller design applied to boats typically found on Amazon rivers. We developed an optimized formulation for the chord and pitch angle distributions, taking into account the classical model of Glauert. A theoretical analysis for the thrust and torque relationships on an annular control volume was performed. The mathematical model used was based on the Blade Element Momentum Theory (BEMT). We concluded that the new methodology proposed in this work demonstrates a good physical behavior when compared with the theory of Glauert and the experimental data of the Wageningen B3-50 propeller.
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