Method for designing a low-pressure turbine of an aircraft...

Details Method for designing a low-pressure turbine of an aircraft... Method for designing a low-pressure turbine of an aircraft...

2005-03-11

2010-10-05

Nguyen, Ninh H (Department: 3745)

Rotary kinetic fluid motors or pumps

With sound or vibratory wave absorbing or preventing means...

C415S199500

Reexamination Certificate

active

07806651

ABSTRACT:
A low-pressure turbine of a gas turbine is disclosed. The turbine comprises a number of stages arranged one behind the other in an axial manner in the flow-through direction of the turbine. Each stage is formed from a fixed vane ring having a number of vanes and from a rotating blade ring having a number of blades. Each stage is characterized by a characteristic value vane-to-blade ratio that indicates the ratio of the number of vanes to the number of blades within a stage. One of the stages of the turbine is designed in such a manner that, in the event of noise-critical conditions of the turbine, the characteristic value vane-to-blade ratio of this stage is between a lower cut-off limit for mode k=−1 of the blade-passing frequency (BPF) of said stage and an upper cut-off limit for the mode k=−2 of the blade-passing frequency (BPF) of this stage.

REFERENCES:
patent: 3194487 (1965-07-01), Tyler
patent: 3270953 (1966-09-01), Jerie et al.
patent: 5169288 (1992-12-01), Gliebe et al.
patent: 5478199 (1995-12-01), Gliebe
patent: 6409469 (2002-06-01), Tse
patent: 6439840 (2002-08-01), Tse
patent: 14 76 877 (1970-02-01), None
patent: 42 28 918 (1993-03-01), None
patent: 1072145 (1967-06-01), None

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