Analysis of turbine moving blades

Venkataswamy, MA and Bhaskaran, TA and Keshab , Barai and Sujata, M and Bhaumik, SK (2003) Analysis of turbine moving blades. Project Report. National Aerospace Laboratories, Bangalore.

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Abstract

The 9th stage turbine blade has failed by fatigue. The fatigue crack had initiated at the fillet of the trailing edge, propagated progressively over about 80% of the blade cross section before giving way to overload fracture. The fatigue appears to be of high cycle – low stress type and stress related. There were no metallurgical abnormalities at the fatigue crack origin. Though the airfoil section of the failed blade was not available, examination of the other blades from the 9th stage turbine suggests that most probably, the fatigue crack has initiated at stress concentrators resulted due to improper machining.

Item Type: Proj.Doc/Technical Report (Project Report)
Uncontrolled Keywords: Steam turbine blade;fatigue;stress concentration
Subjects: AERONAUTICS > Aeronautics (General)
CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Division/Department: Materials Science Division, Materials Science Division, Materials Science Division, Materials Science Division, Materials Science Division
Depositing User: Mrs Manoranjitha M D
Date Deposited: 14 Jul 2011 16:39
Last Modified: 11 Oct 2012 10:45
URI: http://nal-ir.nal.res.in/id/eprint/9357

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