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    • 3. 发明申请
    • Cooling airflow modulation
    • 冷却气流调制
    • US20090196737A1
    • 2009-08-06
    • US12318624
    • 2009-01-02
    • Mark T Mitchell
    • Mark T Mitchell
    • F02C7/18
    • F01D5/186F01D17/085F05D2250/185F05D2270/303F05D2300/5021
    • A gas turbine engine airfoil (22) has a wall (42) provided with a cooling effusion hole (40) therein to facilitate film cooling of the external surface (52) of the wall (42). A member (46) attached to the internal surface (48) of the airfoil wall (42) is provided with an aperture (44) which at least partially overlaps the cooling effusion hole (40). The airfoil wall (42) and member (46) are formed from materials having different coefficients of thermal expansion and are mounted such that over a temperature range, the aperture (44) and cooling effusion hole (40) interact to a greater or lesser extent to modulate the flow of cooling air therethrough.
    • 燃气涡轮发动机翼型件(22)具有在其中设置有冷却积液孔(40)的壁(42),以便于壁(42)的外表面(52)的膜冷却。 附接到翼型件壁(42)的内表面(48)的构件(46)设置有至少部分地与冷却渗出孔(40)重叠的孔(44)。 机翼壁(42)和构件(46)由具有不同热膨胀系数的材料形成,并且安装成使得在温度范围内,孔(44)和冷却渗出孔(40)或多或少地相互作用 以调节冷却空气通过其中的流动。