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    FRICTIONAL RESISTANCE REDUCTION DEVICE FOR SHIP
    3.
    发明公开
    FRICTIONAL RESISTANCE REDUCTION DEVICE FOR SHIP 审中-公开
    装置以降低摩擦为船舶

    公开(公告)号：EP2272747A4

    公开(公告)日：2013-07-31

    申请号：EP09727111

    申请日：2009-03-31

    申请人： NAT MARITIME RES INST

    发明人： KAWASHIMA HIDEKI ,  FUKUDA TETSUGO ,  KODAMA YOSHIAKI ,  HINATSU MUNEHIKO ,  HORI TOSHIFUMI ,  MAKINO MASAHIKO ,  HARUMI KAZUYOSHI ,  OHNAWA MASASHI ,  TAKESHI HARUYA ,  TAKIMOTO TADANORI

    IPC分类号： B63B1/38

    CPC分类号： B63B1/38 ,  B63B2001/385 ,  B63B2001/387 ,  Y02T70/122 ,  Y10T137/3802

    摘要： A inject gas control device that performs, for example, control reflecting variation in vessel velocity over time without adversely affecting the main engine is realized. That is, it is prevented that gas is drawn too much and thereby a gas supply or charged air rate becomes insufficient, efficiency of the main engine is decreased and exhaust gas is deteriorated, and analogous events occur because the gas supply or charged air rate is too much instead. There are provided a main engine 4010 acquiring propelling power for a vessel 1, and a turbocharger 4011 that is driven by exhaust gas from the main engine 4010 and blows pressurized gas to the main engine 4010. A part of the pressurized gas and/or exhaust gas is drawn from between the turbocharger 4011 and the main engine 4010 (5023, 5024 and 5025). The drawn pressurized gas and/or exhaust gas are injected in the proximity 9 of the hull on or below the waterline (5040), and the drawing rate of the pressurized gas and/or the exhaust gas is controlled on the basis of a physical quantity related to a heat load on the main engine 10 and characteristics of the turbocharger (4200).

    PROPELLER WITH SMALL DUCT, AND SHIP
    4.
    发明公开
    PROPELLER WITH SMALL DUCT, AND SHIP 审中-公开
    与小沟渠，船螺旋桨

    公开(公告)号：EP2738084A4

    公开(公告)日：2015-04-08

    申请号：EP12817040

    申请日：2012-07-26

    申请人： NAT MARITIME RES INST

    发明人： SASAKI NORIYUKI ,  KAWASHIMA HIDEKI ,  FUJISAWA JUNICHI

    IPC分类号： B63H5/16 ,  B63H1/26

    CPC分类号： B63H5/16 ,  B63H1/26

    摘要： A propeller 10 setting a small duct 20 of the present invention includes a propeller 10 and a duct 20. A diameter Ddin of the duct is set to 20% or more and 50% or less of a diameter Dp of the propeller 10, and a pitch H of the propeller 10 is a decreasing pitch which reduces in a radial direction of the propeller 10, and which becomes a maximum value at a blade root of the propeller 10 and becomes a minimum value at a blade tip of the propeller 10. The small duct 20 is placed in front of and close to the propeller 10. According to this, in an actual sea, cavitation is suppressed, and a load distribution of the propeller 10 in its radial direction which governs efficiency is optimized by utilizing interference with respect to the small duct 20.