The invention provides a ducted propeller. The ducted propeller comprises a pipe body, a propeller body and a protruding unit. At least one groove is formed in the inner wall of the pipe body; the paddle main body is arranged in the pipe body and is positioned at one end of the pipe body; the groove surrounds the central axis of the pipe body to form a spiral line; the plurality of protruding units are continuously and uniformly distributed in the groove along the spiral line of the groove; the adjacent protruding units are connected end to end. The spiral-line-shaped groove is formed in the inner wall of the pipe body, and the wake flow of the propeller is rectified through the groove, so that when the wake flow flows to the outlet of the free end of the pipe body, the circumferential velocity component of the wake flow is gradually reduced under the action of the groove; therefore, the circumferential velocity component of the wake flow outflow end is obviously smaller than the circumferential velocity component of the wake flow start-in end, and the purposes of improving the propelling efficiency, reducing noise and the like are achieved.
本发明提出了一种导管螺旋桨,包括管体、桨主体及凸出单元;管体内壁上开设有至少一个沟槽;桨主体设置在管体内并位于管体其中一端;沟槽环绕管体中轴线呈螺旋线;若干凸出单元沿沟槽的螺旋线连续均匀的布设在沟槽内;相邻凸出单元首尾相连;通过在管体内壁上开设螺旋线形状的沟槽,通过沟槽对螺旋桨的尾流进行整流,使尾流在向管体自由端的出口流动时,尾流的周向速度分量在沟槽作用下逐渐减小,从而能够使尾流流出端的周向速度分量明显小于尾流始入端的周向速度分量,进而实现提高推进效率、降低噪声等目的。
Ducted propeller
一种导管螺旋桨
2023-11-24
Patent
Electronic Resource
Chinese
IPC: | B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING |
Ducted Propeller Development Status
NTIS | 1957
|Ducted Propeller Assault Transport
NTIS | 1956