Mostrando postagens com marcador Hidrodinâmica. Mostrar todas as postagens
Mostrando postagens com marcador Hidrodinâmica. Mostrar todas as postagens

quinta-feira, 24 de março de 2011

Estudo de manobrabilidade incluindo visualização de escoamento


Um interessantíssimo e completo trabalho tratando tanto de manobrabilidade como de visualização de escoamento, de autoria de Hyunse Yoon, pode ser acessado aqui: http://www.engineering.uiowa.edu/~fluids/Misc/HSYoon-private_old/Thesis/pdf/.

quarta-feira, 17 de novembro de 2010

Fugindo da cavitação




Extraído do excelente livro de Faltinsen, Hydrodynamics of high speed marine vehicles:

"Foil cavitation limits the vessel’s speed to about 50 knots. Proper design to delay cavitation on the aft foil system requires evaluation of the wake from the forward foil system. An important effect is caused by roll-up of tip vortices originating from the forward foil system. The wake from the forward foil causes an angle of attack that varies along the span of the aft foil, which can be counteracted by using a twisted aft foil that is adapted to the inflow. One foil catamaran experienced problems with foil cavitation during operation, which were resolved by drilling holes in the aft part of the foils to provide communication between theflowon the pressure and suction sides of the foils."