PROBLEM TO BE SOLVED: To provide a pump jet propulsion device for a ship which has an excellent propulsion efficiency by use of a pump having an impeller of a size such that the impeller can be accommodated in a hull.SOLUTION: A propulsion unit 10 is fitted to a hull 20. A boundary layer separation plate 30 is attached to a part at which the propulsion unit 10 is fitted to the hull 20. The boundary layer separation plate 30 separates a boundary layer flow from a bottom of a ship, and discharges water through an opening provided on a broadside. A pump input water flow 33 is introduced to a pump and a discharge water flow 34 of the pump is injected into the propulsion unit having an appropriate Coanda surface, whereby a secondary water flow having a large flow quantity is generated.SELECTED DRAWING: Figure 3

    【課題】船体内に収まるサイズのインペラを持つポンプを使用して、推進効率の優れた船舶用ポンプジェット推進装置を提供する。【解決手段】推進装置10を船体20に取付ける。推進装置10を船体20に取付ける箇所には、境界層分離板30が取り付けられる。境界層分離板30は、境界層流を船底から分離し、舷側に設けられた開口部から排水される。ポンプ入水流33はポンプへと導かれ、適切なコアンダ面を持つ推進装置の内部にポンプの排水流34を噴出することで、流量の大きな二次水流を生み出す。【選択図】図3


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    Title :

    PUMP JET PROPULSION DEVICE


    Additional title:

    ポンプジェット推進装置


    Contributors:

    Publication date :

    2016-05-12


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

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



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