Modern configurations of aircraft deal with a high performance design of lifting systems especially oriented to reduction of drag and fuel consumption. An important requirement of civil aircraft is the commercial velocity, so a reduction of drag in cruise condition leads to optimized configuration satisfying both economic and pollution restrictions. The paper shows preliminary results of aerodynamic and structural analyses carried out at the Department of Aerospace Engineering of Pisa University during last three years on a high aspect ratio wing with a curved planform. The wing configuration arises from an early first author idea while all the analyses shown in the paper have been executed by young students in aeronautics. From the aerodynamic point of view curved planform causes a variable swept angle along the wing span: so in transonic flight condition (high subsonic) wave drag effects are strongly reduced. Numerical comparison between curved and traditional swept wing, both designed with similar aerodynamic profiles, shows a strong reduction (5%-10%) of drag coefficient under high subsonic flight conditions. Moreover the curved planform configuration improves aeroelastic behaviors of the wing: in the paper some preliminary results obtained using NASTRAN code are summarized. With similar wing box metallic structures the flutter velocity, at the sea level, of curved configuration increase considerably with respect to the traditional swept wing. The high aspect ratio curved wing configuration analyzed in the paper has been submitted as a national patent: italian demand code PI 2009 A000079.
|Titolo:||PRELIMINARY ANALYSIS OF A HIGH ASPECT RATIO WING WITH CURVED PLANFORM|
|Autori interni:||CHIARELLI, MARIO ROSARIO|
|Anno del prodotto:||2009|
|Appare nelle tipologie:||4.1 Contributo in Atti di convegno|
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|XX Congresso AIDAA - 2009 - Milano - Chiarelli - DOI 10.13140-RG.2.1.4746.9520.pdf||450.9 kB||Adobe PDF||Editoriale||NON PUBBLICO - Accesso privato/ristretto||Utenti riconosciuti Richiedi una copia|