公开(公告)号：US10774651B1

公开(公告)日：2020-09-15

申请号：US15869124

申请日：2018-01-12

Applicant: UNITED TECHNOLOGIES CORPORATION

Inventor： Kurt R. Heinemann ,  Sumin Tao ,  Christopher B. Jelks ,  Xuedong Zhou ,  Mark David Ring ,  Konstantinos Panagiotis Giannakopolous ,  Lisa I. Brilliant

IPC: F01D5/14 ,  F01D5/16 ,  F01D5/28 ,  F01D5/34

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 2.85-3.15 inch (72.4-80.0 mm). A chord length extends in a chordwise direction from the leading edge to the trailing edge at 50% span and is in a range of 1.52-1.82 inch (38.6-46.2 mm). The airfoil element includes at least two of a first mode with a frequency of 506±10% Hz, a second mode with a frequency of 1732±10% Hz, a third mode with a frequency of 2268±10% Hz, a fourth mode with a frequency of 4007±10% Hz, a fifth mode with a frequency of 4851±10% Hz and a sixth mode with a frequency of 6416±10% Hz.