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Axial Compressor Mean-Line Analysis: Choking Modelling and Fully-Coupled Integration in Engine Performance Simulations

Laboratory of Thermal Turbomachines, School of Mechanical Engineering, National Technical University of Athens, 15780 Athens, Greece
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Int. J. Turbomach. Propuls. Power 2021, 6(1), 4; https://doi.org/10.3390/ijtpp6010004
Received: 28 December 2020 / Revised: 16 February 2021 / Accepted: 23 February 2021 / Published: 26 February 2021
A mean-line compressor performance calculation method is presented that covers the entire operating range, including the choked region of the map. It can be directly integrated into overall engine performance models, as it is developed in the same simulation environment. The code materializing the model can inherit the same interfaces, fluid models, and solvers, as the engine cycle model, allowing consistent, transparent, and robust simulations. In order to deal with convergence problems when the compressor operates close to or within the choked operation region, an approach to model choking conditions at blade row and overall compressor level is proposed. The choked portion of the compressor characteristics map is thus numerically established, allowing full knowledge and handling of inter-stage flow conditions. Such choking modelling capabilities are illustrated, for the first time in the open literature, for the case of multi-stage compressors. Integration capabilities of the 1D code within an overall engine model are demonstrated through steady state and transient simulations of a contemporary turbofan layout. Advantages offered by this approach are discussed, while comparison of using alternative approaches for representing compressor performance in overall engine models is discussed. View Full-Text
Keywords: axial compressor; mean-line analysis; choke modelling; 0D/1D coupling axial compressor; mean-line analysis; choke modelling; 0D/1D coupling
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MDPI and ACS Style

Kolias, I.; Alexiou, A.; Aretakis, N.; Mathioudakis, K. Axial Compressor Mean-Line Analysis: Choking Modelling and Fully-Coupled Integration in Engine Performance Simulations. Int. J. Turbomach. Propuls. Power 2021, 6, 4. https://doi.org/10.3390/ijtpp6010004

AMA Style

Kolias I, Alexiou A, Aretakis N, Mathioudakis K. Axial Compressor Mean-Line Analysis: Choking Modelling and Fully-Coupled Integration in Engine Performance Simulations. International Journal of Turbomachinery, Propulsion and Power. 2021; 6(1):4. https://doi.org/10.3390/ijtpp6010004

Chicago/Turabian Style

Kolias, Ioannis, Alexios Alexiou, Nikolaos Aretakis, and Konstantinos Mathioudakis. 2021. "Axial Compressor Mean-Line Analysis: Choking Modelling and Fully-Coupled Integration in Engine Performance Simulations" International Journal of Turbomachinery, Propulsion and Power 6, no. 1: 4. https://doi.org/10.3390/ijtpp6010004

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