CONDUIT COMBINE A UN HELICE DE NAVIRE MUNIE DE PLAQUES DE BARRAGE AUX EXTREMITES DES PALES ET PROCEDE POUR ACCROITRE L'EFFICACITE DE LA PROPULSION D'UN NAVIRE AU MOYEN DE LADITE COMBINAISON

摘要

A tubular duct is provided for ship propellers with blade tips having barrier plates extending transversely therefrom. The tubular ducts are effectively arranged to extend the barrier plates in a manner which, in operation, directs a fluid stream in substantially shock-free contact with such plates.