Details
| Original language | English |
|---|---|
| Publication status | Published - 2019 |
| Event | 13th European Turbomachinery Conference on Turbomachinery Fluid Dynamics and Thermodynamics, ETC 2019 - Lausanne, Switzerland Duration: 8 Apr 2019 → 12 Apr 2019 |
Conference
| Conference | 13th European Turbomachinery Conference on Turbomachinery Fluid Dynamics and Thermodynamics, ETC 2019 |
|---|---|
| Country/Territory | Switzerland |
| City | Lausanne |
| Period | 8 Apr 2019 → 12 Apr 2019 |
Abstract
Measurements of the discharge coefficient of labyrinth seals reveal a strong sensitivity of the cavity flow to even small changes in geometrical parameters. It is shown that accurate measurements of the seal clearance are required to model the flow with a degree of certainty, which permits further conclusions. Based on accurate representations of the geometry in CFD models, it can be demonstrated that RANS flow solvers have substantial deficits in correctly predicting labyrinth seal flow. A novel test rig has been designed and put into operation for studying the labyrinth seal leakage flow in detail using temperature and pressure as well as optical flow velocity measurement methods. The rig uses a rotating disc with a labyrinth seal on its outer perimeter, and an annular flow channel to represent the shroud cavity. Homogeneity of the inlet and outlet boundary conditions is verified by means of circumferentially and radially distributed measurements of the total temperature and pressure. The rig mirrors the geometrical and aerodynamic parameters of the cavities in an axial turbine, which will subsequently be used for further investigations.
Keywords
- Cavity flow, Discharge coefficient, Labyrinth seal, Turbomachinery, Turbulence models
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Mechanics of Materials
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2019. Paper presented at 13th European Turbomachinery Conference on Turbomachinery Fluid Dynamics and Thermodynamics, ETC 2019, Lausanne, Switzerland.
Research output: Contribution to conference › Paper › Research › peer review
}
TY - CONF
T1 - Sensitivity Analysis, Design, Instrumentation, and Experimental Validation of a Novel Labyrinth Seal Rig
AU - Kluge, T.
AU - Wein, L.
AU - Schmierer, R.
AU - Seume, J. R.
N1 - Funding information: The authors gratefully acknowledge the contribution of the DLR Institute of Propulsion Technology and MTU Aero Engines AG providing the TRACE code. Furthermore, the authors thank the Leibniz University Hannover (LUIS) and the North-German Supercomputing Alliance (HLRN) for their provision of computational resources. The investigations were conducted as part of the joint research programme AG Turbo and supported by the German Federal Ministry for Economic Affairs and Energy and MTU Aero Engines AG.
PY - 2019
Y1 - 2019
N2 - Measurements of the discharge coefficient of labyrinth seals reveal a strong sensitivity of the cavity flow to even small changes in geometrical parameters. It is shown that accurate measurements of the seal clearance are required to model the flow with a degree of certainty, which permits further conclusions. Based on accurate representations of the geometry in CFD models, it can be demonstrated that RANS flow solvers have substantial deficits in correctly predicting labyrinth seal flow. A novel test rig has been designed and put into operation for studying the labyrinth seal leakage flow in detail using temperature and pressure as well as optical flow velocity measurement methods. The rig uses a rotating disc with a labyrinth seal on its outer perimeter, and an annular flow channel to represent the shroud cavity. Homogeneity of the inlet and outlet boundary conditions is verified by means of circumferentially and radially distributed measurements of the total temperature and pressure. The rig mirrors the geometrical and aerodynamic parameters of the cavities in an axial turbine, which will subsequently be used for further investigations.
AB - Measurements of the discharge coefficient of labyrinth seals reveal a strong sensitivity of the cavity flow to even small changes in geometrical parameters. It is shown that accurate measurements of the seal clearance are required to model the flow with a degree of certainty, which permits further conclusions. Based on accurate representations of the geometry in CFD models, it can be demonstrated that RANS flow solvers have substantial deficits in correctly predicting labyrinth seal flow. A novel test rig has been designed and put into operation for studying the labyrinth seal leakage flow in detail using temperature and pressure as well as optical flow velocity measurement methods. The rig uses a rotating disc with a labyrinth seal on its outer perimeter, and an annular flow channel to represent the shroud cavity. Homogeneity of the inlet and outlet boundary conditions is verified by means of circumferentially and radially distributed measurements of the total temperature and pressure. The rig mirrors the geometrical and aerodynamic parameters of the cavities in an axial turbine, which will subsequently be used for further investigations.
KW - Cavity flow
KW - Discharge coefficient
KW - Labyrinth seal
KW - Turbomachinery
KW - Turbulence models
UR - http://www.scopus.com/inward/record.url?scp=85065987070&partnerID=8YFLogxK
U2 - 10.29008/ETC2019-078
DO - 10.29008/ETC2019-078
M3 - Paper
T2 - 13th European Turbomachinery Conference on Turbomachinery Fluid Dynamics and Thermodynamics, ETC 2019
Y2 - 8 April 2019 through 12 April 2019
ER -