초록 ▼

A high aspect ratio, low solidity fan blade of an axial flow air cycle machine has a local tip center of gravity axis that has been shifted ahead of an elastic axis. The center of gravity axis can be shifted by clipping the tip of the blade at the trailing edge, by undercutting a rear portion of the

A high aspect ratio, low solidity fan blade of an axial flow air cycle machine has a local tip center of gravity axis that has been shifted ahead of an elastic axis. The center of gravity axis can be shifted by clipping the tip of the blade at the trailing edge, by undercutting a rear portion of the pressure surface, or by sweeping forward leading and trailing edges of the blade by about five degrees (without clipping or undercutting the blade).

대표청구항 ▼

[ We claim:] [1.] A blade of a rotating component of an axial flow turbo-machine, the blade comprising:a root portion;a tip portion; anda mid-span portion intermediate to the root portion and the tip portion;the blade having a high aspect ratio and low solidity;the blade further having a leading edg

[ We claim:] [1.] A blade of a rotating component of an axial flow turbo-machine, the blade comprising:a root portion;a tip portion; anda mid-span portion intermediate to the root portion and the tip portion;the blade having a high aspect ratio and low solidity;the blade further having a leading edge and a trailing edge, a local tip center-of-gravity axis between the leading and trailing edges, and an elastic axis between the leading and trailing edges,the tip portion being swept forward by an angle between 5 degrees and 10 degrees to shift the local tip center of gravity axis between the elastic axis and the leading edge.