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Article Dans Une Revue Journal of Engineering for Gas Turbines and Power Année : 2018

Thermomechanical Model Reduction for Efficient Simulations of Rotor-Stator Contact Interaction

Résumé

Turbomachinery rotor-stator unilateral contact induced interactions play a growing role in lifecycle analysis and thus motivate the use of accurate numerical prediction tools. Recent literature confirmed by ongoing in-house experiments have shown the importance of thermomechanical coupling effects in such interactions. However, most available (possibly reduced-order) models are restricted to the sole mechanical aspects. This work describes a reduction technique of thermomechanical models involving unilateral contact and frictional contact occurrences between rotor and stator components. The proposed methodology is grounded on Guyan and Craig-Bampton methods for the reduction of the structural dynamics in conjunction with Krylov subspace techniques, and specifically the Craig-Hale approach, for the reduction of the thermal equations. The method has the capability to drastically reduce the size of the model while preserving accuracy. It stands as a reliable strategy to perform simulations of thermomechanical models with localized mechanical and thermal loads.
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hal-01989175 , version 1 (22-01-2019)

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Nicolas Guérin, Anders Thorin, Fabrice Thouverez, Mathias Legrand, Patricio Almeida. Thermomechanical Model Reduction for Efficient Simulations of Rotor-Stator Contact Interaction. Journal of Engineering for Gas Turbines and Power, 2018, 141 (2), ⟨10.1115/1.4040858⟩. ⟨hal-01989175⟩
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