Yaser H Alahmadi
Abstract: Various turbulence models have been developed to simulate aerodynamic flows. The eddy viscosity models (EVMs) are commonly implemented to close the Reynolds Averaged Navier-Stokes (RANS) equations, allow them to be the most popular choice for solving aerodynamic problems. EVMs are particularly valued for their robustness and computational efficiency. However, the objectives of achieving both robustness and accuracy in turbulence model development remain a formidable challenge. This study evaluates the performance of a recently developed EVM model in analysing external flows around the NACA0012 airfoil and a 3D Delta wing. Specifically, it examines the effectiveness of the Shear Stress Transport Model with Curvature Correction Modification (SSTCCM) in predicting the flow characteristics of external aerodynamic configurations. Earlier investigations have demonstrated the capability of the SSTCCM model to accurately predict confined swirling flows, such as those in cyclone separators, rotating lids, and sudden expansions. However, the model has yet to be tested in cases involving external flows, where aerodynamic geometry greatly affects the flow behaviour. This study investigates the ability of the SSTCCM model to numerically predict the behavior of external aerodynamic flows. The computational results are compared against experimental data and validated against other EVMs models. The findings show that the SSTCCM model offers a competitive alternative in computational efficiency and superior to conventional EVMs models in terms of accuracy. Conventional EVMs failed to predict lift and drag coefficients accurately, particularly near the stall angle of attack. Moreover, the SSTCCM model successfully captured the wing tip vortices in the 3D Delta wing simulations, highlighting its accurate predictive capabilities for complex flow features.
Keywords: CFD, Aerodynamics, SSTCCM, External Flow, NACA 0012, Delta wing.
Date Published: January 20, 2025 DOI: 10.11159/jffhmt.2025.001
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