Gliding farther and faster / Simon Ulrich in JEC COMPOSITES MAGAZINE, N° 134 (05-06/2020)

[article]  inJEC COMPOSITES MAGAZINE > N° 134 (05-06/2020) . - p. 40-42 Titre : Gliding farther and faster Type de document : texte imprimé Auteurs : Simon Ulrich, Auteur Année de publication : 2020 Article en page(s) : p. 40-42 Langues : Anglais (eng) Catégories : Aérodynamique Ailes (avions) Avions -- Conception et construction Avions -- Fuselage Composites à fibres de carbone Planeur Simulation par ordinateur Index. décimale : 668.4 Plastiques, vinyles Résumé : To reduce the drag on the wings of a sailplane (glider) so it could go faster and farther, engineers needed to shave a small amount of surface area from the wing. This complex task involved fluid, structural and composite material challenges that had to be solved in parallel, which could only be done using engineering simulation. Note de contenu : - Aerodynamic, structural and materials challenges - Using simulation to overcome the challenges - Answers for aerodynamics - Structures and materials - Validation - Fig. 1 : AS 33 hlider plane - Fig. 2 : Configuration investigated for the wing-fuselage junction including a high-wing position to a mid-wing position. Calculations revealed minimum drag for the mid-wing position, especially at high airspeeds - Fig. 3 : ANSYS Fluent CFD revealed unfavourable pressure peaks in the area of the wing-winglet junction, which was originally designed with classical aerodynamic tools. After design iteration with Fluent, it was possible to alleviate this problem and gain some aerodynamic efficiency - Fig. 4 : Safety factors for the carbon fibre-reinforced plastics structure in the area of the inner-wing junction were analyzed with ANSYS Composite PregPost - Fig. 5 : Safety factors for the composite wing were analyzed with ANSYS Composite PrepPost. The centr of the wing's chord has the lowest safety factors because of the compression-loaded sparflange in this area Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35376 [article]

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