Materials Behaviour And Numerical Simulation
Of A Turbine Blade-off Containment Analysis
Author(s)
F. Gálvez, D. A. Cendón, A. Enfedaque & V. Sánchez-Galvez
Abstract
This paper analyses the impact phenomenon of a failed blade against the
containment inside a turbine (called \“blade off”) by using the Finite Element
Method. In addition, the research has also focused on the secondary damage,
which is the damage induced by the debris of the lost blade on the adjacent
blades of the turbine. The paper shows how the model has been arranged from
the beginning, pointing out aspects concerning the materials, initial and
boundary conditions. The study shows the importance of having well known
characterization of the materials involved, including the effects of high strain rate
and high temperature. The results show how both blade off and secondary
damage phenomena can be accurately modelled by FEM and provides useful
information for the entire process.
Keywords: high strain rate, impact, numerical simulation.
1 Introduction
In the rare but possible event of a turbine blade or fan blade failure, the engine
must ensure the containment of it. In other case the blade becomes a projectile
which can seriously damage the aircraft, causing occupants injuries and
eventually leading the airplane to crash. Because this reason, the fan and turbine
containments are usually the heaviest parts of the engines and during the engine
design process, the containment must somehow be ensured. Up to date, the
containment was designed by using certain kind of abacuses from some
experimental tests and more or less documented blade failure real cases. Despite
this can be a quite sure designing tool, it also has some disadvantages: for
example it is not possible to know which would be the critical thickness of the
Keywords
high strain rate, impact, numerical simulation.
Related Book
Other papers in this volume
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