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Communication Dans Un Congrès Année : 2017

Rotor-stator interaction: formulation, reduction and simulation of a nonsmooth thermo-elastic model

Résumé

In turbomachines, heat fluxes are generated during unilateral contact and frictional rotor-stator interactions. Though they are expected to play a significant role in the overall dynamics of engines, their precise influence in the dynamics is not well understood. This contribution proposes a blade-casing reduced-order thermomechanical model involving unilateral contact and frictional terms formulated as a Measure Differential Inclusion together with various numerical methods able to properly capture the dynamics. Comparison with less advanced explicit time-marching schemes is provided. It is shown that the MDI discretized via an implicit scheme is more robust. A sensitivity analysis to the thermal coupling and model reduction is provided. It is found that the proposed solution method sets a sound basis for efficient numerical simulations of thermomechanical rub occurrences in turbomachinery.
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hal-01871945 , version 1 (11-09-2018)

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  • HAL Id : hal-01871945 , version 1

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Anders Thorin, Nicolas Guérin, Mathias Legrand. Rotor-stator interaction: formulation, reduction and simulation of a nonsmooth thermo-elastic model. 17th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, Dec 2017, Maui, United States. ⟨hal-01871945⟩
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