公开(公告)号：US10760592B1

公开(公告)日：2020-09-01

申请号：US15869253

申请日：2018-01-12

Applicant: UNITED TECHNOLOGIES CORPORATION

Inventor： Xuedong Zhou ,  Jordan J. Franklin ,  Michael A. Weisse ,  Lee Drozdenko ,  Mouhamadou Diop ,  Daniel W. Yebo ,  Linda S. Li

IPC: F01D5/16 ,  F04D29/66 ,  F04D29/32 ,  F04D29/38 ,  F02K3/06 ,  F02C3/04

Abstract: A turbomachine airfoil element includes an airfoil that has pressure and suction sides spaced apart from one another in a thickness direction and joined to one another at leading and trailing edges. The airfoil extends in a radial direction a span that is in a range of 17.2-18.2 inches (436-462 mm). A chord length extends in a chordwise direction from the leading edge to the trailing edge at 50% span is in a range of 10.0-11.0 inches (255-281 mm). The airfoil element includes at least two of a first mode with a frequency of 51±10% Hz, a second mode with a frequency of 147±10% Hz, a third mode with a frequency of 267±10% Hz, a fourth mode with a frequency of 350±10% Hz, a fifth mode with a frequency of 454±10% Hz and a sixth mode with a frequency of 619±10% Hz.