Twin-screw ships with transom stern have shown large variations in the components of the propulsive coefficient. Some significant parameters in the propeller-hull-rudder interaction problem have been identified and their effects evaluated in both a generalized sense and a specific LHA ship model. The most important conclusions arising from LHA-model experiments and other investigations are: propeller-rudder gap ratio was a major parameter in propulsion efficiency. The variable wake at the propeller was of paramount importance in selecting propeller direction of rotation exerted a dominant effect on the hull efficiency elements of an LHA model, and, for that case, the superiority of inward rotation with regard to propulsive coefficient was explained. (Author)
Typical Hull-Rudder-Propeller Interferences for Twin-Screw Ships with Transom Stern
1975
37 pages
Report
Keine Angabe
Englisch
Marine Engineering , Propellers(Marine) , Ship hulls , Marine rudders , Water flow , Interactions , Interference , Ship sterns , Wake , Hydrodynamic configurations , Amphibious assault ships , Marine surface propulsion , Coefficients , Efficiency , Rotation , Directional , Ship models , Model tests , LHA class vessels , Twin screw ships , Transom sterns
Kelvin wakes and wave resistance of cruiser- and transom-stern ships
Tema Archiv | 1994
|