Blade for use in fan wheel of turbojet of aircraft, has box structure opened at downstream end of platform and extending over portion of axial length of platform for increasing rigidity of stilt and natural bending frequency of blade

摘要

The blade has a stilt (35) connecting a blade root (46) to a platform (42), and comprising a hollow box structure (36) that is in the shape of tetrahedral. The hollow box structure extends over a portion of axial length of the platform for increasing rigidity of the stilt and natural bending frequency of the blade. The hollow box structure is opened at a downstream end of the platform. The stilt comprises a radial wall that joins the blade root on top of a V-shaped cross section of the structure.