| 摘要 |
<p>#CMT# #/CMT# The vessel (1) has a line of shafts (3) equipped with an engine consisting of a propeller pump (4) including a rotor, stators (40) and a conduit (41). A hull (2) presents a concave form (C) and a curve (I) defining the concave form according to a longitudinal and vertical section plane passing by a rotation axis of the rotor. The curve presents two inflection points (PI1, PI2), where one point is located upstream and the other point is located downstream from the pump, and a tangent (T) parallel with a axis (X-X') of the line. The tangent is located upstream of the pump. #CMT#USE : #/CMT# Passenger vessel. #CMT#ADVANTAGE : #/CMT# The curve of the hull presents two inflection points, where one point is located upstream and the other point is located downstream from the pump, and the tangent parallel with a axis of the line and located upstream of the propeller pump, so that a propulsion system including the pump is placed partially in the concave form of the hull, thus achieving combined effect of viscous deceleration related to proximity of higher plated surface and deceleration of a fluid in a cavity, and hence driving the pump by idle flow so as to improve propulsion efficiency. The arrangement of the hull avoids creation of divergent sections and separations of the flow in a channel and allows external flow with the engine so as to avoid creation of an additional trail on the hull when the engine is under operation, thus limiting suction effect. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a longitudinal cross-sectional view of a hull of a ship with a propulsion installation including a propeller pump. C : Concave form I : Curve PI1, PI2 : Inflection points T : Tangent X-X' : Axis 1 : Passenger vessel 2 : Hull 3 : Line of shafts 4 : Propeller pump 40 : Stators 41 : Conduit.</p> |
