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    • 1. 发明申请
    • GAS TURBINE ENGINE TWO DEGREE OF FREEDOM VARIABLE BLEED VALVE FOR ICE EXTRACTION
    • 燃气涡轮发动机两种自由度可变阀门用于冰提取
    • WO2014088671A8
    • 2015-05-14
    • PCT/US2013059872
    • 2013-09-16
    • GEN ELECTRIC
    • PEZZI PAUL ALFREDMONIZ THOMAS ORYROSS STEVEN ALANPRITCHARD JR BYRON ANDREWCUNNINGHAM GEORGE GOULD IIIHOLM RAYMOND GUST
    • F01D17/10F02C7/052F02C9/18F04D27/02
    • F02C9/18F01D17/105F02C7/052F04D27/0215F04D27/023F05D2250/42
    • A gas turbine engine variable bleed apparatus (48) includes a variable bleed valve door (50) disposed in a bleed inlet (47) in a transition duct (29), rotatable about two or more separate pivot points (160), operable to open and close an aft bleed slot (170) extending outwardly from transition duct (29), and operable to open and close a forward bleed slot (180) extending inwardly into transition duct (29). Door (50) is operable to transition between a first position with aft bleed slot (170) open and forward bleed slot (180) closed to a second position with aft bleed slot (170) closed and forward bleed slot (180) open without fully closing door (50). Door (50) is rotatable about an axis (160) translatable between the two or more separate pivot points. Transition duct (29) having a transition duct conical angle (Al) at least about 10 degrees greater than a booster conical angle (A2) of a booster outer shroud (222) upstream of transition duct (29).
    • 燃气涡轮发动机可变排放装置(48)包括设置在过渡管道(29)中的排放入口(47)中的可变排放阀门(50),可绕两个或更多个分离的枢转点(160)旋转,可操作以打开 并且关闭从过渡管道(29)向外延伸的后排出槽(170),并且可操作以打开和关闭向内延伸到过渡管道(29)中的向前排放槽(180)。 门(50)可操作以在具有尾部泄放槽(170)的第一位置和闭合到第二位置的前进泄放槽(180)之间转换,其中后泄漏槽(170)封闭且向前排放槽(180)没有完全打开 关闭门(50)。 门(50)可围绕可在两个或更多个分离的枢转点之间平移的轴线(160)旋转。 过渡管道(29)具有比过渡管道(29)上游的增压器外护罩(222)的增压锥角(A2)大至少约10度的过渡管道锥角(Al)。