Comparison of Lumped and Unsteady 1-D Models for Simulation of a Radial Turbine 2009-01-0303
The physical 1-D model of a radial turbine consists of a set of gas ducts featuring total pressure and/or temperature changes and losses. Therefore, the wave propagation and filling/emptying plays a significant role if a turbine is subjected to unsteady gas flow.
The results of unsteady turbine simulation using the basic modules of generalized 1-D manifold solver in GT Power are demonstrated. The turbine model calibration parameters can be identified by means of 1-D steady model used in optimization code loop.
The examples of model results are compared to steady flow map predictions of turbine efficiency and engine pumping loop work.
The model may be used for prediction of turbine data in out-of-design points as presented in the paper. The other important role of a model, however, is an accurate evaluation of turbine parameters from pressure and speed measurements at an engine in operation.
Citation: Macek, J., Vítek, O., Burič, J., and Doleček, V., "Comparison of Lumped and Unsteady 1-D Models for Simulation of a Radial Turbine," SAE Int. J. Engines 2(1):173-188, 2009, https://doi.org/10.4271/2009-01-0303. Download Citation
Author(s):
Jan Macek, Oldřich Vítek, Ján Burič, Vít Doleček
Affiliated:
Czech Technical University
Pages: 16
Event:
SAE World Congress & Exhibition
ISSN:
1946-3936
e-ISSN:
1946-3944
Also in:
Modeling of SI and Diesel Engines, 2009-SP-2244, SAE International Journal of Engines-V118-3EJ, SAE International Journal of Engines-V118-3
Related Topics:
Scale models
Simulation and modeling
Optimization
Calibration
Manifolds
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