Petrocchi, A. and Barakos, G. (2024) Transonic buffet simulation using a partially-averaged Navier-Stokes approach. Aerospace Science and Technology, 149, 109134. (doi: 10.1016/j.ast.2024.109134)
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Abstract
The present article assesses the capability of the partially averaged Navier-Stokes (PANS) method to reproduce accurately the self-sustained shock oscillations, also known as transonic buffet, occurring on airfoils and wings at transonic regime under certain conditions of Mach number and angle of attack. The test case under analysis is an OAT15A unswept wing at Mach number M∞ = 0.73 and Reynolds number Rec = 3 × 106. The three-dimensional flow is studied by accounting for the wind tunnel walls adopted in the experiments of Jacquin et al. [1] in the simulations. The computations on a large-span, confined configuration reveal a strong three-dimensionality of the flow both before and after the buffet onset. Attention is paid to the comparison with unsteady Reynoldsaveraged Navier Stokes (URANS) results, to show the benefits of PANS in resolving flow unsteadiness at different flow resolutions, especially on affordable CFD grids, at limited additional cost. In this context, the role of the mesh metrics and the local turbulence level in the formulation of the model is described, as well as the relation of this latter with the spatiotemporal discretization used for the numerical simulations. The aim is to extend the use of PANS and obtain accurate predictions of flow cases involving shock-wave boundary layer interactions without expensive approaches.
| Item Type: | Articles |
|---|---|
| Additional Information: | The present work is supported by the TEAMAero European project No. 860909 - Towards Effective Flow Control and Mitigation of Shock Effects In Aeronautical Applications. |
| Keywords: | Buffet, turbulence modelling, PANS. |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Barakos, Professor George and Petrocchi, Mr Andrea |
| Creator Roles: | Petrocchi, A.Data curation, Software, Validation, Writing – original draft Barakos, G.Conceptualization, Software, Supervision, Writing – original draft, Writing – review and editing |
| Authors: | Petrocchi, A., and Barakos, G. |
| College/School: | College of Science and Engineering > School of Engineering > Autonomous Systems and Connectivity |
| Journal Name: | Aerospace Science and Technology |
| Publisher: | Elsevier |
| ISSN: | 1270-9638 |
| ISSN (Online): | 1626-3219 |
| Published Online: | 17 April 2024 |
| Copyright Holders: | Copyright © 2024 The Authors |
| First Published: | First published in Aerospace Science and Technology 149: 109134 |
| Publisher Policy: | Reproduced under a Creative Commons License |
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