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    • 18. 发明授权
    • Centrifugal air flow control
    • 离心式气流控制
    • US06203269B1
    • 2001-03-20
    • US09257483
    • 1999-02-25
    • Peter F. LorberWesley K. Lord
    • Peter F. LorberWesley K. Lord
    • F01D514
    • B64C21/025B64C11/18B64C27/467B64C2230/20B64C2230/28F01D5/145F04D29/682F04D29/684Y02T50/166Y02T50/66Y02T50/673Y10S415/914
    • Blades, including helicopter rotor blades, gas turbine engine fan blades, air moving machinery fan blades, and the like, have an air inlet near the hub of the blade, which may be on the pressure side of the blade and/or near the leading edge or trailing edge nearer the tip of the blades, with an air plenum between the air inlet and the slots, whereby air is forced into the inlet, through the plenum and out of the slots into the flow adjacent the blades. The slots may be through the suction surface of the blade, typically near the boundary layer separation point, so that air flowing out of the slots into the boundary layer of the suction surface of the blade, thereby delay or prevent the onset of boundary layer separation, or to reduce supersonic shock. The inlet may be near the trailing edge of the blade, near the root, adjacent to the air inlet of the core of a jet engine, to suction off air and reduce fan wake blockage at the core inlet. The slots may be through the pressure surface adjacent the blade tip edge of fan blades to reduce blade tip leakage effects.
    • 包括直升机转子叶片,燃气涡轮发动机风扇叶片,气动机械风扇叶片等的叶片在叶片的轮毂附近具有空气入口,其可以在叶片的压力侧和/或靠近叶片的压力侧 靠近叶片尖端的边缘或后缘,在空气入口和狭槽之间具有空气增压室,由此空气被迫进入入口,通过气室,并从槽中进入与叶片相邻的流中。 槽可以通过叶片的吸附表面,通常在边界层分离点附近,使得空气从槽中流出到叶片的吸力表面的边界层中,从而延迟或防止边界层分离的开始 ,或减少超音速冲击。 入口可以靠近叶片的后缘,靠近根部,与喷气发动机的核心的空气入口相邻,以吸入空气并减少在核心入口处的风扇尾部堵塞。 槽可以通过与风扇叶片的叶片尖端边缘相邻的压力表面,以减少叶片尖端泄漏效应。