Turbomachine blade
AssigneeUnited Technologies Corporation
InventorsBryan C. Atkins, Robert J. Esteve, Richard A. Lomenzo, Jr., David P. Houston
Life of this patent
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Abstract
A turbomachine airfoil element has an airfoil. The airfoil has an inboard end, an outboard end, a leading edge, a trailing edge, a pressure side, and a suction side. A span between the inboard and an outboard end is 1.4-1.6 inch. A chord length at 50% span is 0.9-1.4 inch. At least three of the following resonance frequencies are present. A first mode resonance frequency is 2591.5±10% Hz. A second mode resonance frequency is 4675.2±10% Hz. A third mode resonance frequency is 7892.9±10% Hz. A fourth mode resonance frequency is 10098.2±10% Hz. A fifth mode resonance frequency is 14808.2±10% Hz.
Claims20
A turbomachine airfoil element comprising:
- an airfoil having:
- an inboard end;
- an outboard end;
- a leading edge;
- a trailing edge;
- a pressure side;
- and a suction side,
- wherein:
- a span between the inboard end and the outboard end is 1.4-1.6 inch;
- a chord length at 50% span is 0.9-1.4 inch;
- and
- at least three of:
- a first mode resonance frequency is 2591.5±10% Hz;
- a second mode resonance frequency is 4675.2±10% Hz;
- a third mode resonance frequency is 7892.9±10% Hz;
- a fourth mode resonance frequency is 10098.2±10% Hz;
- and
- a fifth mode resonance frequency is 14808.2±10% Hz.
An airfoil element for a turbomachine, the airfoil element comprising:
- plural cavities, wherein the cavities are cord-wise adjacent, and span-wise extending between opposing leading and trailing edges of the airfoil;
- the airfoil having plural modes, including:
- one or more easywise bending modes, including at least one of a first easywise bending mode at 2591.5±10% Hz and a second easywise bending mode at 10098.2±10% Hz;
- one or more stiffwise bending modes, including a first stiffwise bending mode at 4675.2±10% Hz;
- and
- one or more twist modes, including at least one of a first twist mode occurring at 7892.9±10% Hz and a second twist mode occurring at 14808.2±10% Hz.
A turbomachine airfoil element comprising:
- an airfoil having:
- an inboard end;
- an outboard end;
- a leading edge;
- a trailing edge;
- a pressure side;
- and a suction side,
- wherein:
- a span between the inboard end and the outboard end is 1.4-1.6 inch;
- a chord length at 50% span is 0.9-1.4 inches;
- and
- at a running speed/condition at least three of:
- a first mode resonance frequency is 2585.4±10% Hz;
- a second mode resonance frequency is 4590.1±10% Hz;
- a third mode resonance frequency is 7625.9±10% Hz;
- a fourth mode resonance frequency is 9848.0±10% Hz;
- and
- a fifth mode resonance frequency is 14385.1±10% Hz.
Dependencies are inferred from the claim text.