Invention Grant
- Patent Title: Intentionally frequency mistuned turbine blades
- Patent Title (中): 故意频率失调的涡轮叶片
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Application No.: US13589057Application Date: 2012-08-17
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Publication No.: US09097125B2Publication Date: 2015-08-04
- Inventor: Gholamreza Ghorbani Zarimahalleh , Reza Torabideh , Hamid Motamedi Zoka , Arash Jahangiri Zad
- Applicant: Gholamreza Ghorbani Zarimahalleh , Reza Torabideh , Hamid Motamedi Zoka , Arash Jahangiri Zad
- Applicant Address: IR Tehran
- Assignee: MAPNA Group
- Current Assignee: MAPNA Group
- Current Assignee Address: IR Tehran
- Main IPC: F01D5/16
- IPC: F01D5/16 ; F01D5/10 ; F01D5/14 ; F04D29/66 ; F04D29/32

Abstract:
A new, more economical design for intentionally frequency mistuned turbine blades for more efficient turbine engines is disclosed. A rotating disk of a turbine engine includes first turbine blades that alternate between second turbine blades. The second turbine blades are thicker than the first turbine blades, within manufacturing tolerances, in sections from about their mean line to their airfoil tip. The first and second turbine blades can be cast using two different molds, resulting in an economical manufacturing method. As such, the natural frequency of the second turbine blades is about 3% less than the natural frequency of the first turbine blades. As a result of the intentional difference in natural frequencies of the two different turbine blades, the rotating disk does not experience flutter instability.
Public/Granted literature
- US20140050590A1 INTENTIONALLY FREQUENCY MISTUNED TURBINE BLADES Public/Granted day:2014-02-20
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