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Open AccessArticle

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

1
ISAE-SUPAERO, Université de Toulouse, 31013 Toulouse, France
2
ALTRAN Technologies, 31700 Blagnac, France
*
Author to whom correspondence should be addressed.
This paper is an extended version of our paper published in Proceedings of the European Turbomachinery Conference ETC13, Lausanne, Switzerland, 8–12 April 2019, Paper No. 440.
These authors contributed equally to this work.
Int. J. Turbomach. Propuls. Power 2019, 4(3), 29; https://doi.org/10.3390/ijtpp4030029
Received: 27 May 2019 / Revised: 1 August 2019 / Accepted: 13 August 2019 / Published: 21 August 2019
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. View Full-Text
Keywords: Boundary Layer Ingestion; Inlet Distortion; Body Force Modeling; Unsteady RANS Boundary Layer Ingestion; Inlet Distortion; Body Force Modeling; Unsteady RANS
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Benichou, E.; Dufour, G.; Bousquet, Y.; Binder, N.; Ortolan, A.; Carbonneau, X. Body Force Modeling of the Aerodynamics of a Low-Speed Fan under Distorted Inflow . Int. J. Turbomach. Propuls. Power 2019, 4, 29.

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