Prediction of a Laminar Separation Bubble on Low-Reynolds Airfoils Using Variational Multiscale Method

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Abstract

The paper presents the application of a finite element numerical approach for predicting the development and locating the Laminar Separation Bubble (LSB) on low Reynolds airfoils. The method is a linearized and segregated variation of the Variational Multi-Scale method (LS-VMS). The aim is to demonstrate the validity of this new method, overcoming the need for calibration based on experiments and/or custom-fitting transition functions. It has been tested on the SD7003 airfoil at Re = 60000, obtaining results aligned with previously published experimental and numerical results. Furthermore, it has been tested for the DU89-134 profile, a high lift-to-drag ratio airfoil used for high-altitude pseudo-satellite applications. For this geometry, various configurations (AoA = 5°, Re =250000, 500000) compatible with low stratospheric flight have been examined and compared with RANS simulations coupled with transitional models showing close agreement.
Original languageEnglish
Title of host publicationAIAA Aviation and Aeronautics Forum and Exposition, AIAA AVIATION Forum 2024
DOIs
Publication statusPublished - 2024

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