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A hybrid RANS model of wing-body junction flow
Rona, Aldo El-Dosoky, M. F. F.
Rona, Aldo
El-Dosoky, M. F. F.
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2019-09-26
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Abstract
The three-dimensional flow separation over the Rood wing-body junction is an exemplar application of separation affecting many important flows in turbomachinery and aerodynamics. Conventional Reynolds Averaged Navier Stokes (RANS) methods struggle to reproduce the complexity of this flow. In this paper, an unconventional use is made of a hybrid Reynolds Averaged Navier Stokes (RANS) model to tackle this challenge. The hybridization technique combines the Menter 𝑘 − 𝜔 − 𝑆𝑆𝑇 model with the one equation sub-grid-scale (SGS) model by Yoshizawa through a blending function, based on the wall-normal distance. The hybrid RANS turbulence closure captured most of the flow features reported in past experiments with reasonable accuracy. The model captured also the small secondary vortex at the corner ahead of the wing nose and at the trailing edge. This feature is scarcely documented in the literature. The study highlights the importance of the spatial resolution near the wing leading edge, where this localised secondary recirculation was observed by the hybrid RANS model. It also provides evidence on the applicability of the hybrid Menter and Yoshizawa turbulence closure to the wing-body junction flows in aircraft and turbomachines, where the flows are characterised by a substantially time-invariant three-dimensional separation.
Citation
Rona, A., El-Dosoky, M. F. F. and Adebayo, D. S. (2019) A hybrid RANS model of wing-body junction flow, European Journal of Mechanics B: Fluids, Volume 79, January–February 2020, Pages 283-296.
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Journal article
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en
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This is an accepted manuscript of an article published by Elsevier in European Journal of Mechanics B: Fluids on 26/09/2019, available online: https://doi.org/10.1016/j.euromechflu.2019.09.014
The accepted version of the publication may differ from the final published version.
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0997-7546