A Numerical Study and Design of Turbine Blade under High Temperature and Rotational Speed Using FEM

Abstract:

Article Preview

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 et al., "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

Export:

Price:

$38.00

[1] J.T. Yeom and N.K. Park: Technical Report- PGM2710, Korean Institute of Metals and Materials (2005).

[2] M. Doner, K.R. Bain and J.H. Adams: Evaluation of Methods for the Treatment of Mean Stress Effects on Low-Cycle Fatigue, Journal of Engineering for Power, Transactions of the ASME, Vol. 104 (1982), pp.403-411.

DOI: 10.1115/1.3227294

[3] J. H. Adams: Nonlinear Damage Cumulation in Solution Treated and Aged Ti 6Al-4V, ASME Gas Turbine Conference (1981).

[4] W. Jakobeit, J.P. Pfeifer, G. Ullrich: Evaluation of high temperature alloys for helium gas turbines, Nuclear technology, Vol. 66 (1984), pp.195-206.

DOI: 10.13182/nt84-a33467

[5] Y.S. Na, J.T. Yeom, J.Y. Kim and N.K. Park: Effects of heat Treatment on Tensile and Creep-Rupture Properties of 713LC Ni-based Superalloy, Journal of The Korean Institute of Metals and Materials, Vol. 39, No. 11 (2001), pp.1249-1253.

In order to see related information, you need to Login.