aeroengine; frictional contact; seal wire; turbine blade; Aero-engine; Blade-discs; Complicated systems; Condition; Cyclic symmetry; Frictional contact; Multiple components; Seal wire; Time-domain analysis; Turbine blade; Nuclear Energy and Engineering; Fuel Technology; Aerospace Engineering; Energy Engineering and Power Technology; Mechanical Engineering
Abstract :
[en] Complicated systems made of multiple components are known to be difficult to model, considering their solutions can change dramatically even with the slightest variations in conditions. Aircraft engines contain such complicated systems, and some components in aircraft engines’ turbines can cause significant changes in the system’s overall response. Hence, this study is focused on investigating the behavior of a turbine blade of an aircraft engine and the effects of the contact between the blade and the seal wire on the dynamics of the blade-disk system. The investigation is performed via various numerical simulations in time and frequency domains. One sector of the bladed disk is modeled using the finite element method with the lock plate and the seal wire imposing cyclic symmetry boundary conditions in the static, modal, and frequency domain forced response analyses. In time domain analyses, the cyclic symmetry is replaced with simplified displacement restricting boundary conditions. The time domain analysis contains steady-state forced responses of the system. The results show that contact with the seal wire is not a major source of nonlinearity and damping. The contacts with the lock plate contribute more to the vibration damping than the seal wire. However, compared to the contacts at the root of the blade, both components remain less significant with regard to frictional damping and nonlinearity.
Disciplines :
Aerospace & aeronautics engineering
Author, co-author :
Tüfekci, Mertol ; Department of Mechanical Engineering, Imperial College London, South Kensington Campus, London, United Kingdom
Haddad, Fadi El; Department of Mechanical Engineering, Imperial College London, South Kensington Campus, London, United Kingdom
Salles, Loïc ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Mechanical aspects of turbomachinery and aerospace propulsion ; Department of Mechanical Engineering, Imperial College London, South Kensington Campus, London, United Kingdom
Setchfield, Richard; Derby, United Kingdom
Renson, Ludovic; Department of Mechanical Engineering, Imperial College London, South Kensington Campus, London, United Kingdom
Language :
English
Title :
Effects of the Seal Wire on the Nonlinear Dynamics of the Aircraft Engine Turbine Blades
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