公开(公告)号：JP2002188404A

公开(公告)日：2002-07-05

申请号：JP2001356867

申请日：2001-11-22

Applicant: UNITED TECHNOLOGIES CORP

Inventor： MONTGOMERY MATTHEW ,  SAMIT MARC ,  OROSA JOHN

IPC: F01D5/10 ,  F01D5/16 ,  F01D5/26 ,  F01D25/06 ,  F04D29/54 ,  F04D29/66

Abstract: PROBLEM TO BE SOLVED: To provide an improved row of flow directing elements (10, 12) used in turbomachinery devices. SOLUTION: The row of flow directing elements for which flutter stability has been improved includes at least one high-frequency flow directing element (10) and at least one low frequency flow directing element (12). In a preferred embodiment, the row includes a plurality of alternately installed high-frequency and low-frequency flow directing elements (10, 12). The three lowest frequency vibration modes for the respective high-frequency flow directing elements (10) are higher in frequency at least by 2.0% than the three lowest frequency vibration modes for the respective low frequency flow directing elements (12). The row of this invention is of value especially as a part of a rotor stage in a turbo machinery device.