Method for modifying blades of fan, compressor, and turbine of axial flow type, and blades obtained by the modification

    公开(公告)号:US12078079B2

    公开(公告)日:2024-09-03

    申请号:US18296576

    申请日:2023-04-06

    申请人: IHI CORPORATION

    IPC分类号: F01D5/14

    摘要: Provided is a blade capable of optimizing an outflow angle in substantially the entire hub region and tip region, particularly in a blade-end-side hub region and a blade-end-side tip region. The blade includes: a base blade part; a suction-side elevated portion provided on a suction surface near a trailing edge in at least one of the blade-end-side tip region and the blade-end-side hub region of the base blade part; and a pressure-side elevated portion provided on a pressure surface near the trailing edge in at least one of a midspan-side tip region and a midspan-side hub region of the base blade part. An airfoil at each spanwise position where the elevated portion is provided is such that a trailing-edge curve of a base airfoil is changed to a modified trailing-edge curve. The modified trailing-edge curve includes a portion of the trailing-edge curve of the base airfoil in the spanwise region where the elevated portion is provided, the portion being closer to the pressure side or the suction side than the trailing edge, and an elevated portion curve. The elevated portion curve includes a concave front-side curve and a convex rear-side curve.