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    COOLABLE AIRFOIL
    1.
    发明专利
    COOLABLE AIRFOIL 失效

    公开(公告)号：JPH11107702A

    公开(公告)日：1999-04-20

    申请号：JP22391698

    申请日：1998-08-07

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： KRAUSE DAVID A ,  MONGILLO DOMINIC J JR ,  SOECHTING FRIEDRICH O ,  ZELESKY MARK F

    IPC: F01D5/18

    Abstract: PROBLEM TO BE SOLVED: To provide a coolable airfoil or vane, which can operate at a high temperature for a long time but requires a minimal amount of coolant. SOLUTION: A blade or vane for a gas turbine engine includes a main cooling system 42 having a series of intermediate passages 44, 46a, 46b, 46c, and 48, and a subordinate cooling system 92 having a series of cooling ducts 94 (94a to 94h). The ducts of subordinate cooling system 92, being parallel to and having the same radial extent with the intermediate passages, are installed between the intermediate passages 44, etc., and outer surface 28 of the airfoil and within a surrounding wall 16. The ducts are installed within high temperature load regions 104 and 106 in the direction of a chord so as to maximize efficiency. The ducts are recommended to have the same extent in the direction of a chord in several intermediate passages in order to avoid an excessive rise in coolant temperature within the intermediate passages. The length of the duct in the direction of a chord is limited so as not to generate a temperature gradient, with could lead to failure, at airfoil wall 16.

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