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| Format: | Recurso digital |
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| Veröffentlicht: |
Zenodo
2026
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| Online-Zugang: | https://doi.org/10.5281/zenodo.20359418 |
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Inhaltsangabe:
- <p>The predictions of an analytical model for seal flutter have<br>been compared with the experimental data of a rotating multicavity<br>labyrinth seal test rig. The experiments were conducted<br>to assess the flutter inception in a large set of operating conditions<br>by varying the rotational speed and the total pressure ratio<br>across the seal. The sensitivity of the stability to the clearance<br>variation is also studied for straight-through and stepped configurations.<br>The analytical model derived by Corral et al. (2022,<br>“ Effective Clearance and Differential Gapping Impact on Seal<br>Flutter Modelling and Validation,” ASME J. Turbomach, 144 (7),<br>pp. 071010) has been previously validated by using a frequency<br>domain linearized Navier-Stokes solver retaining the effect of the<br>effective gaps and the kinetic energy carried over to downstream<br>fin. To reduce the uncertainty, a set of 3D steady RANS simulations<br>is performed and the steady characteristics of the seal are<br>used to inform the flutter model. The effect of dissimilar gaps<br>has been studied by generating a set of numerical models with<br>geometrical gap differences. The stability limit has been investigated<br>in a large range of operating conditions. Firstly, the nondimensional<br>parameters controlling seal flutter will be introduced,<br>then the test rig, the test matrix, and the numerical setup of the<br>simulations, are described. Finally, the experimental data are<br>compared with the prediction of the analytical model in a wide<br>range of operating conditions</p>