The present paper aims to provide aerodynamic design guidelines for an aircraft dorsal fin, obtained using CFD RANS technique. A parametric aerodynamic investigation about dorsal fin length, height, sweep angle, and planform area has been performed in order to evaluate the effects of geometric variations on the dorsal fin and vertical tail aerodynamic behavior in sideslip conditions. More than 30 dorsal fin geometries have been investigated, mounted on a typical large turbopropeller fuselage with a vertical tail. Main results show that there is no effect of the dorsal fin up to 20° of sideslip angle. At higher angles, the vertical tail stalls and the flow field around the empennage is strongly influenced by two vortices generated by the dorsal fin intersection with the fuselage (primary vortex) and with the vertical tail (secondary vortex). The stall phenomenon appears around 35° of sideslip angle. Moreover, dorsal fin slightly reduced fuselage instability. Finally, some wind tunnel tests have been performed on two dorsal fin geometries to validate the numerical analyses. Experimental tests have shown a good agreement with CFD simulations and have given useful qualitative indications on the aerodynamic behavior of the vertical tail at high angles of sideslip, with and without dorsal fin.

Aerodynamic Design Guidelines of Aircraft Dorsal Fin / Nicolosi, Fabrizio; Ciliberti, Danilo; Della Vecchia, Pierluigi; Corcione, Salvatore. - Unico:(2016), pp. 1-13. (Intervento presentato al convegno 34th AIAA Applied Aerodynamics Conference, AIAA Aviation 2016 tenutosi a Washington (USA) nel June, 2016) [10.2514/6.2016-4330].

Aerodynamic Design Guidelines of Aircraft Dorsal Fin

Nicolosi, Fabrizio
Supervision
;
Ciliberti, Danilo
Investigation
;
Della Vecchia, Pierluigi
Investigation
;
Corcione Salvatore
Investigation
2016

Abstract

The present paper aims to provide aerodynamic design guidelines for an aircraft dorsal fin, obtained using CFD RANS technique. A parametric aerodynamic investigation about dorsal fin length, height, sweep angle, and planform area has been performed in order to evaluate the effects of geometric variations on the dorsal fin and vertical tail aerodynamic behavior in sideslip conditions. More than 30 dorsal fin geometries have been investigated, mounted on a typical large turbopropeller fuselage with a vertical tail. Main results show that there is no effect of the dorsal fin up to 20° of sideslip angle. At higher angles, the vertical tail stalls and the flow field around the empennage is strongly influenced by two vortices generated by the dorsal fin intersection with the fuselage (primary vortex) and with the vertical tail (secondary vortex). The stall phenomenon appears around 35° of sideslip angle. Moreover, dorsal fin slightly reduced fuselage instability. Finally, some wind tunnel tests have been performed on two dorsal fin geometries to validate the numerical analyses. Experimental tests have shown a good agreement with CFD simulations and have given useful qualitative indications on the aerodynamic behavior of the vertical tail at high angles of sideslip, with and without dorsal fin.
2016
978-162410437-4
Aerodynamic Design Guidelines of Aircraft Dorsal Fin / Nicolosi, Fabrizio; Ciliberti, Danilo; Della Vecchia, Pierluigi; Corcione, Salvatore. - Unico:(2016), pp. 1-13. (Intervento presentato al convegno 34th AIAA Applied Aerodynamics Conference, AIAA Aviation 2016 tenutosi a Washington (USA) nel June, 2016) [10.2514/6.2016-4330].
File in questo prodotto:
File Dimensione Formato  
AIAA 2016.pdf

non disponibili

Descrizione: Articolo principale
Tipologia: Documento in Post-print
Licenza: Accesso privato/ristretto
Dimensione 1.73 MB
Formato Adobe PDF
1.73 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/657644
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 8
  • ???jsp.display-item.citation.isi??? ND
social impact