Aerodynamic analysis of a harmonically morphing flap using a hybrid turbulence model and dynamic meshing

Abdessemed, Chawki; Yao, Yufeng; Bouferrouk, Abdessalem; Narayan, Pritesh P

Abstract

© 2018, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved. A numerical study of the NACA 0012 airfoil fitted with a harmonically morphing trailing edge flap (TEF) is performed at an angle of attack of 4º and a Reynolds number Re = 0.62×106The study focuses on high frequency, low amplitude configurations for the morphing flap and their effects on the aerodynamic performance and flow structures in the wake. Dynamic meshing methods implemented in the commercial software Ansys Fluent and driven by an in-house user-defined function (UDF) were used to model the TEF deformation using a modified unsteady parametrization. The Stress Blended Eddy Simulation (SBES) hybrid turbulence model was used for all parametric studies. For a fixed amplitude, a range of morphing frequencies (lower and higher than the natural shedding frequency) was explored. Obtained results show that at certain high frequencies a slight increase in aerodynamic efficiency could be achieved compared with a baseline design. When the morphing frequency was fixed at its shedding value, the range of amplitudes investigated indicated the presence of an optimal morphing amplitude for which up to 3% increased aerodynamic efficiency could be obtained. Some preliminary results for upstroke and downstroke TEF oscillations are briefly presented to illustrate some differences compared with the main morphing strategy adopted in the paper.

Citation

Abdessemed, C., Yao, Y., Bouferrouk, A., & Narayan, P. P. (2018). Aerodynamic analysis of a harmonically morphing flap using a hybrid turbulence model and dynamic meshing. In 2018 Applied Aerodynamics Conferencehttps://doi.org/10.2514/6.2018-3813

• Conference Name: 2018 Applied Aerodynamics Conference
• Acceptance Date: May 12, 2018
• Publication Date: Jan 1, 2018
• Deposit Date: Jul 4, 2018
• Book Title: 2018 Applied Aerodynamics Conference
• DOI: https://doi.org/10.2514/6.2018-3813
• Keywords: aerodynamic, morphing, flow control, aerospace, CFD, SBES, LES, RANS ,Flap, aviation
• Public URL: https://uwe-repository.worktribe.com/output/866038
• Publisher URL: http://dx.doi.org/10.2514/6.2018-3813
• Additional Information: Title of Conference or Conference Proceedings : 2018 Applied Aerodynamics Conference, AIAA AVIATION Forum