The main goal of the proposed paper is the numerical and experimental investigation of multiple winglets influence on the reduction of induced drag. This results in the improvement of climbing performances of a motorglider or hang-glider. In a precedent work [1] a set of multiple winglets, very similar to the bird tip feathers called remiges, were designed and optimized for the hang-glider belonging to Angelo D’Arrigo, a world champion hang-glider pilot and record holder. The research aims was to optimize the CL1,5/CD parameter since this is directly proportional to the sink rate. In this work the effects of the multiple winglets, set on an elliptical wing and tested in a wind tunnel, are compared to the effects of three different single ‘classical’ winglets that were designed using a panel method code and were also tested in the same wind tunnel in order to compare their span efficiency to the one of the multiple winglets.
Single versus multiple winglets: numerical and experimental investigation / Coiro, Domenico; Nicolosi, Fabrizio; Scherillo, Ferdinando; U., Maisto. - ELETTRONICO. - (2008), pp. 1-11. (Intervento presentato al convegno 26th International Congress of Aeronautical Sciences (ICAS 2008) tenutosi a Anchorage (Alaska, USA) nel 14-19 Sepetember, 2008).
Single versus multiple winglets: numerical and experimental investigation
COIRO, DOMENICO;NICOLOSI, FABRIZIO;SCHERILLO, FERDINANDO;
2008
Abstract
The main goal of the proposed paper is the numerical and experimental investigation of multiple winglets influence on the reduction of induced drag. This results in the improvement of climbing performances of a motorglider or hang-glider. In a precedent work [1] a set of multiple winglets, very similar to the bird tip feathers called remiges, were designed and optimized for the hang-glider belonging to Angelo D’Arrigo, a world champion hang-glider pilot and record holder. The research aims was to optimize the CL1,5/CD parameter since this is directly proportional to the sink rate. In this work the effects of the multiple winglets, set on an elliptical wing and tested in a wind tunnel, are compared to the effects of three different single ‘classical’ winglets that were designed using a panel method code and were also tested in the same wind tunnel in order to compare their span efficiency to the one of the multiple winglets.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
