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Body Force Modeling of the Aerodynamics of a Low-Speed Fan under Distorted Inflow

Benichou, Emmanuel and Dufour, Guillaume and Bousquet, Yannick and Binder, Nicolas and Ortolan, Aurélie and Carbonneau, Xavier Body Force Modeling of the Aerodynamics of a Low-Speed Fan under Distorted Inflow. (2019) International Journal of Turbomachinery, Propulsion and Power, 4 (3). 1-15. ISSN 2504-186X

(Document in English)

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Official URL: https://doi.org/10.3390/ijtpp4030029


New propulsive concepts, such as boundary layer ingestion, involve stronger interactions between the engine and its environment, and are thus more complex flows compared to classical architectures. Usual turbomachinery design tools are inadequate, and new numerical methodologies are needed to accurately predict the engine performance with affordable CPU resources. The present paper examines the relevance of a reduced-order modeling approach—the body force modeling (BFM) method—for a low-speed cooling fan with inflow distortion. The formulation itself accounts for the blade metal blockage and compressibility effects, and it relies on a semiempirical loss model, independent of computational fluid dynamics (CFD) calibration. The BFM results obtained in the present work are assessed against full-annulus unsteady Reynolds-averaged Navier-Stokes (URANS) results and experiments. The comparison shows that the BFM approach successfully quantifies the fan stage performance. Furthermore, the distortion transfer across the stage is examined and the flow patterns observed are found to be the same as in the URANS results and in the measurements. Hence, this methodology, coming at a low CPU cost, is well-adapted to the early design phase of an innovative propulsion system.

Item Type:Article
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > ALTRAN (FRANCE)
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
Laboratory name:
Deposited On:12 Nov 2019 08:32

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