Paper Title:
A Numerical Study and Design of Turbine Blade under High Temperature and Rotational Speed Using FEM
  Abstract

The turbine wheels of a turbocharger are operated at high revolution speed in high temperature inlet gas. Alloy 713LC blades of the turbine wheel broke in an hour the during a model test. Two failures and several cracks were found in the turbine blades. Failures in blades are suspected to occur as a result of thermal mechanical stresses or fatigue load and other cause such as creep-rupture and resonant vibration. The present study investigates the possible causes of the failure of these blades. FEM (Finite Element Method) was used to calculate the thermal centrifugal stresses and natural frequency to find the cause of failures. LCF (Low Cycle Fatigue) life of blades was roughly estimated by using the stress and strain level calculated by FEM. The investigation indicates that the failures were associated with resonant forces and HCF (High Cycle Fatigue).

  Info
Periodical
Key Engineering Materials (Volumes 324-325)
Edited by
M.H. Aliabadi, Qingfen Li, Li Li and F.-G. Buchholz
Pages
1063-1066
DOI
10.4028/www.scientific.net/KEM.324-325.1063
Citation
J. H. Lee, K. H. Lee, K. S. Kim, "A Numerical Study and Design of Turbine Blade under High Temperature and Rotational Speed Using FEM ", Key Engineering Materials, Vols. 324-325, pp. 1063-1066, 2006
Online since
November 2006
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Price
$32.00
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