WIT Press


FE-analysis Of Stresses In A Francis Turbine Runner At Derbendikhan Power Station

Price

Free (open access)

Paper DOI

10.2495/FSI130221

Volume

129

Pages

9

Page Range

253 - 261

Published

2013

Size

1,285 kb

Author(s)

R. A. Saeed, A. N. Galybin, & V. Popov

Abstract

This paper investigates the hydraulic induced stresses in a complete Francis runner at Derbendikhan power station by using Finite Element Analysis (FEA). Computations of water pressure were carried out with appropriate boundary and specific turbine loadings conditions obtained from CFD analysis. FE-analysis was carried out to compute stress distribution in the runner blades. This paper discusses combination of fluid and structure model, furthermore, this paper also discusses the maximum stress location on the blade of the runner. The results show that the maximum stresses caused by the hydraulic forces are situated at the transition between the blades and the crown/band on the trailing edge. This explains why this region has been identified as a critical area for fatigue crack initiation in the Francis turbine runner. Keywords: Francis turbine runner, fatigue cracks, FEM stress analysis.

Keywords

Francis turbine runner, fatigue cracks, FEM stress analysis.