142.
    发明专利
    未知

    公开(公告)号:DE69107988T2

    公开(公告)日:1995-11-02

    申请号:DE69107988

    申请日:1991-12-24

    Abstract: Cooling air to the 1-2 turbine stage seal is supplied in parallel with air to the vane (52) between the turbines (42, 48) from a plenum (24). A modulatable valve in the supply line to the plenum (24) regulates the air flow in response to a gas temperature sensed in the seal area by a thermocouple (26). Valve and thermocouples are checked for proper operation. Immediate alerts and maintenance messages are established along with fail safe operating conditions upon fault detection. Over cooling of the seal area during low power operation, in anticipation of a power increase, is used to improve low cycle fatigue life of the turbine disk and seal runner.

    GEARED TURBOFAN ENGINE WITH TARGETED MODULAR EFFICIENCY
    145.
    发明公开
    GEARED TURBOFAN ENGINE WITH TARGETED MODULAR EFFICIENCY 审中-公开
    TURBOGEBLÄSEMOTORMIT GEZIELTER MODULARER WIRKUNG

    公开(公告)号:EP3058202A4

    公开(公告)日:2017-06-28

    申请号:EP14870182

    申请日:2014-09-24

    Abstract: A turbofan engine includes a fan section including a fan blade having a leading edge and hub to tip ratio of less than about 0.34 and greater than about 0.020 measured at the leading edge and a speed change mechanism with gear ratio greater than about 2.6 to 1. A first compression section includes a last blade trailing edge radial tip length that is greater than about 67% of the radial tip length of a leading edge of a first stage of the first compression section. A second compression section includes a last blade trailing edge radial tip length that is greater than about 57% of a radial tip length of a leading edge of a first stage of the first compression section.

    Abstract translation: 涡轮风扇发动机包括风扇部分,风扇部分包括风扇叶片,风扇叶片具有在前缘处测量的小于大约0.34且大于大约0.020的前缘和毂到尖端比率以及具有大于大约2.6比1的齿轮比的变速机构。 第一压缩区段包括最终叶片后缘径向末端长度,该长度大于第一压缩区段的第一级的前缘的径向末端长度的约67%。 第二压缩区段包括最终叶片后缘径向末端长度,该长度大于第一压缩区段的第一级的前缘的径向末端长度的约57%。

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