GAS TURBINE ENGINE WITH LOW STAGE COUNT LOW PRESSURE TURBINE
    9.
    发明申请
    GAS TURBINE ENGINE WITH LOW STAGE COUNT LOW PRESSURE TURBINE 审中-公开
    燃气涡轮发动机,低压低压涡轮

    公开(公告)号:US20150315977A1

    公开(公告)日:2015-11-05

    申请号:US14755366

    申请日:2015-06-30

    Abstract: A gas turbine engine includes a core nacelle defined about an engine axis. A fan nacelle is mounted at least partially around the core nacelle to define a fan bypass airflow path for a fan bypass airflow. A gear train is defined along an engine axis. The gear train defines a gear reduction ratio of greater than or equal to about 2.3. A fan drive turbine along the engine axis which drives the gear train. The fan drive turbine includes three to six (3-6) stages. A fan is configured for rotation within the fan nacelle for operation at a fan pressure ratio less than about 1.45. A fan variable area nozzle is axially movable relative to said fan nacelle to vary a fan nozzle exit area and adjust a pressure ratio of the fan bypass airflow during engine operation. A high bypass gas turbine engine is also disclosed.

    Abstract translation: 燃气涡轮发动机包括围绕发动机轴线限定的核心机舱。 风扇机舱至少部分地安装在核心机舱周围,以限定用于风扇旁路气流的风扇旁路气流路径。 齿轮系沿发动机轴线定义。 齿轮系确定齿轮减速比大于或等于约2.3。 沿着发动机轴线的驱动齿轮系的风扇驱动涡轮机。 风扇驱动轮机包括三到六(3-6)个阶段。 风扇被配置为在风扇机舱内旋转,以便在小于约1.45的风扇压力比下操作。 风扇可变区域喷嘴可相对于所述风扇机舱轴向移动,以改变风扇喷嘴出口区域,并且在发动机运行期间调节风扇旁路气流的压力比。 还公开了一种高旁路燃气涡轮发动机。

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