The invention provides a ducted propeller with a variable tip clearance and a use method thereof. The ducted propeller comprises a pipe body, the paddles are arranged in the pipe body and axially rotate around the pipe body; the skin is laid on the inner wall of the pipe body and has elastic tensile property; the ring assembly is arranged between the pipe body and the skin and surrounds the paddle; the inner wall of the ring assembly is tightly attached to the skin, the ring assembly has the capacity of deforming and changing the inner diameter and drives the skin to elastically stretch or contract, and the distance between the part, tightly attached to the inner wall of the ring assembly, of the skin and the blade tip is adjusted; the ring assembly deforms and changes the inner diameter of the ring assembly, so that the skin is driven to stretch or contract, the distance between the inner wall of the ring assembly and the skin on the ring assembly and the blade tip is adjusted, the amount of fluid flowing through the tip gap is controlled by reducing the tip gap as much as possible but not completely eliminating the tip gap, and the fluid is controlled to form a small vortex nucleus after flowing through the tip gap. Meanwhile, the fluid is prevented from being transferred through other parts of the paddle under the action of pressure difference on the two sides of the paddle, so that the strength of the tip clearance vortex is weakened.

    本发明提出了一种梢隙可变的导管螺旋桨及其使用方法,包括管体;桨叶设置在管体内且围绕管体轴向转动;蒙皮敷设在管体内壁上并具有弹性拉伸性能;环组件设置在管体与蒙皮之间并环绕在桨叶外;环组件内壁紧贴蒙皮,环组件具有形变且改变内径的能力并带动蒙皮弹性拉伸或者收缩,并调整蒙皮被环组件内壁紧贴的部分与桨叶叶梢的间距;通过环组件形变并改变自身内径,从而带动蒙皮拉伸或者收缩,从而调整环组件内壁及其上的蒙皮与桨叶叶梢的间距大小,通过尽可能的缩小梢隙但又不会完全消除梢隙来控制流经梢隙的流体量,控制流体流经梢隙后形成较小的涡核,同时避免流体在桨叶两侧压力差的作用下通过桨叶的其他部分进行转移,从而削弱梢隙涡的强度。


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    Title :

    Using method of ducted propeller with variable tip clearance


    Additional title:

    一种梢隙可变的导管螺旋桨的使用方法


    Contributors:
    LIU BING (author) / WU JIAFENG (author) / WEI WEI (author) / CAO HEYUN (author) / WANG PENG (author) / CAI CHEN (author) / SONG QINGHUA (author) / CAO XIAOMING (author)

    Publication date :

    2024-03-08


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING



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