Low noise turbine for geared turbofan engine

a geared turbofan and low noise technology, applied in the direction of liquid fuel engines, machines/engines, efficient propulsion technologies, etc., can solve the problems of reducing aerodynamic efficiency, acoustically cutting-off designs may come at the expense of increased weight, and low pressure turbines can be significant noise sources
US20130202403A1Inactive Publication Date: 2013-08-08MTU AERO ENGINES GMBH
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
MTU AERO ENGINES GMBH
Publication Date
2013-08-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

A gas turbine engine is utilized in combination with a gear reduction to reduce the speed of a fan relative to a low pressure turbine speed. The gas turbine engine is designed such that a blade count in the low pressure turbine multiplied by the speed of the low pressure turbine will result in operational noise that is above a sensitive range for human hearing. A method and turbine module are also disclosed.
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Description

CROSS-REFERENCE TO RELATED APPLICATION

[0001] This application is a continuation of U.S. patent application Ser. No. 13 / 403,005, filed Feb. 23, 2012, which claims priority to U.S. Provisional Application No. 61 / 592,643, filed Jan. 31, 2012.BACKGROUND

[0002] This application relates to the design of a turbine which can be operated to produce noise that is less sensitive to human hearing.

[0003] Gas turbine engines are known, and typically include a fan delivering air into a compressor. The air is compressed in the compressor and delivered downstream into a combustor section where it was mixed with fuel and ignited. Products of this combustion pass downstream over turbine rotors, driving the turbine rotors to rotate.

[0004] Typically, there is a high pressure turbine rotor, and a low pressure turbine rotor. Each of the turbine rotors include a number of rows of turbine blades which rotate with the rotor. Interspersed between the rows of turbine blades are vanes.

[0005] The low pressure turbine ...

Claims

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