| _version_ | 1866902089478701056 |
|---|---|
| author | Corral, Roque Greco, Michele |
| author_facet | Corral, Roque Greco, Michele |
| contents | <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> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_20359418 |
| institution | Zenodo |
| language | |
| publishDate | 2026 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | EXPERIMENTAL VALIDATION OF A SEAL FLUTTER MODEL Corral, Roque Greco, Michele <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> |
| title | EXPERIMENTAL VALIDATION OF A SEAL FLUTTER MODEL |
| url | https://doi.org/10.5281/zenodo.20359418 |