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    • 61. 发明申请
    • BIFURCATION AND AFT VENT USED TO VARY FAN NOZZLE EXIT AREA
    • 用于风扇喷嘴出口区域的分岔和通风口
    • US20090178416A1
    • 2009-07-16
    • US12374336
    • 2006-10-12
    • Edward F. MigliaroMichael WinterAshok K. Jain
    • Edward F. MigliaroMichael WinterAshok K. Jain
    • F02K1/30F02K3/06
    • F02K1/15F02K1/30F02K3/06F05D2220/326F05D2220/327
    • A turbofan engine includes a core nacelle housing a spool having a turbine. A turbofan is arranged upstream from the core nacelle and is coupled to the spool. A fan nacelle surrounds the turbofan and core nacelle. A bifurcation supports the core nacelle relative to the fan nacelle and extends radially between the nacelles. The core and fan nacelles provide a bypass flow path receiving bypass flow from the turbofan. In the example, the nacelles provide a fixed nozzle exit area. The bifurcation includes an inlet that is in communication with a passage. The passage is selectively opened and closed by a valve to provide air from the inlet to a vent opening near the nozzle exit area. By opening the valve, the nozzle exit area is effectively increased to provide increased bypass flow through the turbine engine.
    • 涡轮风扇发动机包括容纳具有涡轮的阀芯的核心机舱。 涡轮风扇布置在核心机舱的上游并联接到线轴。 风扇机舱围绕涡轮风扇和核心机舱。 分叉支撑相对于风扇机舱的核心机舱,并且在发动机舱之间径向延伸。 核心和风扇舱提供旁路流路,从涡轮风扇接收旁路流。 在该示例中,发动机舱提供固定的喷嘴出口区域。 分叉包括与通道连通的入口。 该通道由阀选择性地打开和关闭,以将空气从入口提供到喷嘴出口区域附近的通风口。 通过打开阀门,喷嘴出口区域被有效地增加,以提供通过涡轮发动机的增加的旁路流量。