A finite element stress analysis has been carried out on two configurations of impulse turbine blade, hollow and solid. The hollow turbine blade has significant manufacturing advantages over the solid blade and it is an aim of the analysis to compare how well the blades support the forces exerted on them. The centrifugal and aerodynamic forces on the blades have been calculated. Safe working stresses and strains were identified and post solution checks were carried out and confirmed the order of magnitude of the finite element results. Visualisations of the finite element results are also presented. It was found that the stresses produced in both the hollow and solid blades do not exceed safe working stresses. Based on this analysis, the hollow blade variant was selected for manufacture due to its cost advantages and superior lead-time characteristic over the solid blade.
Stress analysis of impulse turbine blades
2001
7 Seiten, 10 Quellen
Aufsatz (Konferenz)
Englisch
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