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Numerical Investigations of Turbulent Flow Past a Generic Airship

Abstract : Turbulent separated flows around an airship-like geometry (a prolate spheroid 6:1) are investigated using three turbulence modelings based on statistical and Large Eddy Simulation (LES) approaches. The turbulence models used in the simulations are a standard high Reynolds $k$-$\varepsilon$ model, a Smagorinsky LES model and a variational multiscale LES one. The flow of interest is characterized by a relatively low Mach number ($Mach =0.15$), an angle of attack set to $20^\circ$ and a Reynolds number fixed to $4´ 10^4$. The three-dimensional compressible Navier-Stokes equations equipped with the previous turbulent models are discretized by a mixed finite element/finite volume method. The simulations show that the primary longitudinal vortex is predicted by the three models, but only the VMS-LES model predicts a secondary vortical flow structure that is observed in experimental studies.
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Submitted on : Friday, May 19, 2006 - 8:50:16 PM
Last modification on : Friday, January 15, 2021 - 9:24:25 AM
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  • HAL Id : inria-00070551, version 1



Kamal El Omari, Éric Schall, Bruno Koobus, Alain Dervieux. Numerical Investigations of Turbulent Flow Past a Generic Airship. [Research Report] RR-5455, INRIA. 2006, pp.22. ⟨inria-00070551⟩



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