Propulsion apparatus for a vessel

The propulsion apparatus for a vessel comprises a main screw (2) and a push type POD propeller (10A) which is provided rearward of the main screw (2). Furthermore, a plurality of grooves (15) which extend along flow directions of a hub vortex generated by the main screw (2), are provided on a front...

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Bibliographische Detailangaben
Hauptverfasser:	ISHIKAWA, SATORU, HOSHINO, TETSUJI, SAKAMOTO, TOSHINOBU
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	MARINE PROPULSION OR STEERING PERFORMING OPERATIONS RELATED EQUIPMENT SHIPS OR OTHER WATERBORNE VESSELS TRANSPORTING
Online-Zugang:	Volltext bestellen
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Beschreibung
Zusammenfassung:	The propulsion apparatus for a vessel comprises a main screw (2) and a push type POD propeller (10A) which is provided rearward of the main screw (2). Furthermore, a plurality of grooves (15) which extend along flow directions of a hub vortex generated by the main screw (2), are provided on a front end portion of a casing (11) of the POD propeller (10A). According to this propulsion apparatus for a vessel, the hub vortex generated by the main (2) screw rearward of the main screw (2) is weakened by diffusing the hub vortex along the grooves, and therefore, the propulsion efficiency of the propulsion apparatus for a vessel is improved.