Analysis of components from the crashed aeroengine

Bhaumik, SK (2003) Analysis of components from the crashed aeroengine. Project Report. National Aerospace Laboratories, Bangalore.

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Abstract

Components from crashed aeroengine were sent to the laboratory for metallurgical investigation. Investigation revealed that the Rotary Slide Valve (RSV) got seized due to presence of foreign abrasive particles rich in silicon, aluminum and oxygen. These particles were found to be in the size range 5-15 m. The seizure of the RSV has led to the shearing off of cardon shaft due to torsional overload. Fractographic study indicated that the failure of the cardon shaft took place under the superimposition of bending stresses, probably due to misalignment. The damages seen on the other components such as LPTR blades, HPTR blades and Nozzle Guide Vanes (1st and 2nd stages) are secondary in nature and subsequent to the primary failure. It appears most probable that the failure of RSV has resulted in overspeeding of the engine leading to subsequent failures.

Item Type: Proj.Doc/Technical Report (Project Report)
Uncontrolled Keywords: Aeroengine;Rotary slide valve;cardon shaft;seizure
Subjects: AERONAUTICS > Aeronautics (General)
CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Division/Department: Materials Science Division
Depositing User: Mrs Manoranjitha M D
Date Deposited: 07 Jul 2011 14:47
Last Modified: 07 Jul 2011 14:47
URI: http://nal-ir.nal.res.in/id/eprint/9304

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