This paper presents results of unsteady viscous flow calculations and corresponding cold flow experiments of a three-stage low-pressure turbine. The investigation emphasizes the study of unsteady flow interaction. A time-accurate Reynolds-averaged Navier–Stokes solver is applied for the computations. Turbulence is modeled using the Spalart–Allmaras one-equation turbulence model and the influence of modern transition models on the unsteady flow predictions is investigated. The integration of the governing equations in time is performed with a four-stage Runge–Kutta scheme, which is accelerated by a two-grid method in the viscous boundary layer around the blades. At the inlet and outlet, nonreflecting boundary conditions are used. The quasi-three-dimensional calculations are conducted on a stream surface around midspan, allowing a varying stream tube thickness. In order to study the unsteady flow interaction, a three-stage low-pressure turbine rig of a modern commercial jet engine is built up. In addition to the design point, the Reynolds number, the wheel speed, and the pressure ratio are also varied in the tests. The numerical method is able to capture important unsteady effects found in the experiments, i.e., unsteady transition as well as the blade row interaction. In particular, the flow field with respect to time-averaged and unsteady quantities such as surface pressure, entropy, and skin friction is compared with the experiments conducted in the cold air flow test rig. [S0889-504X(00)02004-3]
Skip Nav Destination
e-mail: wolfgang.hoehn@muc.mtu.de
Article navigation
October 2000
Technical Papers
Numerical and Experimental Investigation of Unsteady Flow Interaction in a Low-Pressure Multistage Turbine
Wolfgang Ho¨hn,
e-mail: wolfgang.hoehn@muc.mtu.de
Wolfgang Ho¨hn
MTU Motoren- und Turbinen-Union, Mu¨nchen GmbH, Department of Acoustics and Aeroelasticity, Dachauer Straße 665, D-80995 Mu¨nchen, Germany
Search for other works by this author on:
Klaus Heinig
Klaus Heinig
MTU Motoren- und Turbinen-Union, Mu¨nchen GmbH, Department of Acoustics and Aeroelasticity, Dachauer Straße 665, D-80995 Mu¨nchen, Germany
Search for other works by this author on:
Wolfgang Ho¨hn
MTU Motoren- und Turbinen-Union, Mu¨nchen GmbH, Department of Acoustics and Aeroelasticity, Dachauer Straße 665, D-80995 Mu¨nchen, Germany
e-mail: wolfgang.hoehn@muc.mtu.de
Klaus Heinig
MTU Motoren- und Turbinen-Union, Mu¨nchen GmbH, Department of Acoustics and Aeroelasticity, Dachauer Straße 665, D-80995 Mu¨nchen, Germany
Contributed by the International Gas Turbine Institute and presented at the 45th International Gas Turbine and Aeroengine Congress and Exhibition, Munich, Germany, May 8–11, 2000. Manuscript received by the International Gas Turbine Institute February 2000. Paper No. 2000-GT-437. Review Chair: D. Ballal.
J. Turbomach. Oct 2000, 122(4): 628-633 (6 pages)
Published Online: February 1, 2000
Article history
Received:
February 1, 2000
Citation
Ho¨hn, W., and Heinig , K. (February 1, 2000). "Numerical and Experimental Investigation of Unsteady Flow Interaction in a Low-Pressure Multistage Turbine ." ASME. J. Turbomach. October 2000; 122(4): 628–633. https://doi.org/10.1115/1.1290397
Download citation file:
Get Email Alerts
Cited By
Related Articles
Unsteady Flow/Quasi-Steady Heat Transfer Computations on a Turbine Rotor and Comparison With Experiments
J. Turbomach (January,2002)
Navier–Stokes Solutions of Unsteady Flow in a Compressor Rotor
J. Turbomach (October,1986)
Separated Flow Transition on an LP Turbine Blade With Pulsed Flow Control
J. Turbomach (April,2008)
Related Chapters
Control and Operational Performance
Closed-Cycle Gas Turbines: Operating Experience and Future Potential
Cavitating Structures at Inception in Turbulent Shear Flow
Proceedings of the 10th International Symposium on Cavitation (CAV2018)
Thermodynamic Performance
Closed-Cycle Gas Turbines: Operating Experience and Future Potential