GEOMETRIC APPROACH TO STRESS REDUCED INTRA-FLOW PATH SHROUDS FOR TUNING MODAL RESPONSES IN RAM AIR TURBINE ROTORS

    公开(公告)号:US20220135242A1

    公开(公告)日:2022-05-05

    申请号:US17089564

    申请日:2020-11-04

    Abstract: A ram air turbine rotor comprises at least one intra-flow path shroud structure coupled between rotor blades, along a radial position between a support disc and an outer rim. The shroud structure includes shroud sectors each coupled between a respective pair of blades. The sectors each include a first edge adjacent to leading edges of the respective pair of blades, the first edge including a first curved segment, and a second edge adjacent to trailing edges of the respective pair of blades, the second edge including a second curved segment. The curved segments are each partially defined by a respective ellipse having a semi-major axis and a semi-minor axis. The semi-major axis is a portion of a spanwise distance between the respective pair of blades. The semi-minor axis is a portion of an axial distance between the leading edge of one blade and the trailing edge of an adjacent blade.

    Multistage axial-centrifugal compressor systems and methods for manufacture

    公开(公告)号:US11156092B2

    公开(公告)日:2021-10-26

    申请号:US16269804

    申请日:2019-02-07

    Abstract: A method of manufacturing a multistage axial-centrifugal compressor for a gas turbine engine and a multistage axial-centrifugal compressor that includes a series of axial compressor stages each having a rotor mounted to a common shaft positioned upstream from a centrifugal compressor stage mounted to the common shaft. The method includes determining an operational rotor tip speed for each of the axial stages. The method includes comparing the operational rotor tip speed to a threshold range value and determining to machine an airfoil of the rotor for at least one of the axial stages by an arbitrary manufacturing approach based on the operational rotor tip speed as greater than the threshold range value. The method includes determining to machine an airfoil of the rotor for at least one of the axial stages by a flank manufacturing approach based on the operational rotor tip speed as less than the threshold range value.

    FORWARD-SWEPT IMPELLERS AND GAS TURBINE ENGINES EMPLOYING THE SAME
    9.
    发明申请
    FORWARD-SWEPT IMPELLERS AND GAS TURBINE ENGINES EMPLOYING THE SAME 有权
    前进式驱动器和使用其的气动涡轮发动机

    公开(公告)号:US20160238018A1

    公开(公告)日:2016-08-18

    申请号:US14623761

    申请日:2015-02-17

    Abstract: Embodiments of a forward-swept impeller are provide, as are embodiments of a gas turbine engine containing a forward-swept impeller. In one embodiment, the gas turbine engine includes a shaft and a forward-swept impeller mounted to the shaft. The forward-swept impeller includes, in turn, an inboard impeller section, an outboard impeller section circumscribing the inboard impeller section, and a plurality of hub flow paths extending over the forward-swept impeller from the inboard impeller section to the outboard impeller section. The plurality of hub flow paths each have a flow path exit that is tilted in a forward direction, as taken along a line tangent to the flow path exit.

    Abstract translation: 如同包含前掠式叶轮的燃气涡轮发动机的实施例一样,提供了前掠式叶轮的实施例。 在一个实施例中,燃气涡轮发动机包括安装在轴上的轴和向前扫掠的叶轮。 前掠式叶轮又包括内侧叶轮部分,外侧叶轮部分,其包围内侧叶轮部分,以及多个轮毂流动路径,其沿前掠式叶轮从内侧叶轮部分延伸到外侧叶轮部分。 多个轮毂流动路径各自具有沿着与流路出口相切的直线沿向前方向倾斜的流路出口。

    MULTISTAGE AXIAL-CENTRIFUGAL COMPRESSOR SYSTEMS AND METHODS FOR MANUFACTURE

    公开(公告)号:US20200256192A1

    公开(公告)日:2020-08-13

    申请号:US16269804

    申请日:2019-02-07

    Abstract: A method of manufacturing a multistage axial-centrifugal compressor for a gas turbine engine and a multistage axial-centrifugal compressor that includes a series of axial compressor stages each having a rotor mounted to a common shaft positioned upstream from a centrifugal compressor stage mounted to the common shaft. The method includes determining an operational rotor tip speed for each of the axial stages. The method includes comparing the operational rotor tip speed to a threshold range value and determining to machine an airfoil of the rotor for at least one of the axial stages by an arbitrary manufacturing approach based on the operational rotor tip speed as greater than the threshold range value. The method includes determining to machine an airfoil of the rotor for at least one of the axial stages by a flank manufacturing approach based on the operational rotor tip speed as less than the threshold range value.

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