\شماره٪٪۱
Thiede, P. ``Aerodynamic drag reduction technologies'', {\it Proceedings
of the CEAS/DragNet European Drag Reduction Conference}, 19-21
June 2000, Potsdam, Germany (2000).
\شماره٪٪۲
Nikpoor Parizi, P. Banazadeh, A. ``Reduction of induced drag
in human powered aircraft using wing-grids'', {\it The First National
Aerodynamics \& Hydrodynamics Conference -HAC2012 16-17 October,
2012, Institute of Aviation Industries Organization}, Tehran,
(2012).
\شماره٪٪۳
Shelton, A., Tomar, A., Prasad, J. and et al.
``Active multiple winglets for improved unmanned-aerial-vehicle
performance'', {\it Journal of aircraft}, {\bf 43}, pp. 110-116,
(2006).
\شماره٪٪۴
Marec, J.-P. ``Drag reduction: A major task for research'',
{\it In Aerodynamic drag reduction technologies}, ed: Springer,
pp. 17-27 (2001).
\شماره٪٪۵
Spillman, J. ``The use of wing tip sails to reduce vortex drag'',
{\it The Aeronautical Journal}, {\bf 82}, pp. 387-395, (1978).
\شماره٪٪۶
Spillman, J., Ratcliffe, H. and McVitie, A. ``Flight experiments
to evaluate the effect of wing-tip sails on fuel consumption
and handling characteristics'', {\it The Aeronautical Journal},
{\bf 83}, pp. 279-281 (1979).
\شماره٪٪۷
Whitcomb, R.T.``A design approach and selected wind tunnel
results at high subsonic speeds for wing-tip mounted winglets'',
{\it NASA TN D-8260} (1976).
\شماره٪٪۸
Whitcomb, R.T. ``Method for reducing aerodynamic drag'', {\it NASA
CP 2211 Dryden Symposyum} (1981).
\شماره٪٪۹
MORTARA, K. MAUGHMER, M. ``A method for the prediction of induced
drag for planar and nonplanarwings'', {\it In 11th Applied Aerodynamics
Conference}, p. 3420 (1993).
\شماره٪٪۱۰
Nazarinia, M., Soltani, M.R. and Ghorbanian, K. ``Experimental
study of vortex shapes behind a wing equipped with different
winglets'' (2006).
\شماره٪٪۱۱
Soltani, M.R., Ghorbanian, K. and Nazarinia, M. ``Experimental
investigation of the effect of various winglet shapes on the
total pressure distribution behind a wing'', {\it Proceeding of the
24th International Council of Aeronautical Sciences}. Yokohama,
Japan, (2004).
\شماره٪٪۱۲
La Roche, U. and Palffy, S. ``Wing-grid, a novel device for reduction
of induced drag on wings'',
{\it In ICAS PROCEEDINGS}, pp. 2303-2309 (1996).
\شماره٪٪۱۳
La Roche, U. and La Roche, H.L. ``Induced drag reduction using
multiple winglets, looking beyond the prandtl-munk linear model'',
{\it In 2nd AIAA Flow Control Conference}, p. 2120 (2004).
\شماره٪٪۱۴
Catalano, F. and Ceron-Mu\~{n}oz, H.``Experimental analysis of aerodynamics
characteristics of adaptive multi-winglets'', {\it In 43rd AIAA Aerospace
Sciences Meeting and Exhibit}, p. 1231 (2005).
\شماره٪٪۱۵
Zimmer, H. ``The aerodynamic optimization of wings at subsonic
speeds and the influence of wingtip design. Thesis'' (1987).
\شماره٪٪۱۶
Coiro, D., Nicolosi, F., Scherillo, F. and et al. "Single versus
multiple winglets: numerical and experimental investigation'',
{\it 26Th Int. Congr. Aeronaut. Sci}, pp. 1-11 (2008).
\شماره٪٪۱۷
Naderi, A., Ebrahimian, H. and Sharifi, A. ``Experimental investigation
of grid winglet effects on aerodynamic characteristics of a wing
model at low reynolds number'', {\it Aeronautical Journal}, {\bf 2},
pp. 1-14 (2014).
\شماره٪٪۱۸
Ara, I., Ali, M., Islam, M.Q. and et al. ``Performance study
of winglets on tapered wing with curved trailing edge'', {\it In AIP
Conference proceedings} (2017).
\شماره٪٪۱۹
Khalil, E.E., Helal, H., Abdellatif, O. and et al. ``Effect
of raked winglet on aircraft performance'', {\it In 55th AIAA Aerospace
Sciences Meeting}, p. 1841 (2017).
\شماره٪٪۲۰
Ara, I., Ali, M., Islam, M.Q. and et al. ``An experimental
investigation on the aerodynamic characteristics of naca 4412
with winglets'', {\it In AIP Conference Proceedings}, p. 060004 (2019).
\شماره٪٪۲۱
Cheng, Z.-P., Xiang, Y. and Liu, H. ``Experimental investigation
on the structures and induced drag of wingtip vortices for different
wingtip configurations'', {\it Proceedings of the Institution of Mechanical
Engineers, Part G: Journal of Aerospace Engineering}, p. 0954410020947911
(2020).
\شماره٪٪۲۲
Naderinezhd, M. and Javareshkian, M.H. `` Numerical study of
the effect of three different types of winglets on aerodynamic
performance flow in with low reynolds number'', {\it Scientific of
Journal Fluid Mechanics and Aerodynamics}, {\bf 9}, pp. 83-98
(In Persian) (2020).
\شماره٪٪۲۳
Deshpande, P., Vikraman, A., Anand, S. and et al.
``Experimental investigation of effect
of winglets on the aerodynamic performance of a mini uav'', {\it Journal
of Aerospace Engineering}, {\bf 34}, p. 04020089 (2020).
\شماره٪٪۲۴
Chen, T. and Katz, J. ``Induced drag of high-aspect ratio wings'',
{\it In 42nd AIAA Aerospace Sciences Meeting and Exhibit}, p.
38 (2004).
\شماره٪٪۲۵
Naca 2412. www.airfoil.tools.com.
\شماره٪٪۲۶
Gerontakos, P. and Lee, T. ``Effect of winglet dihedral on a tip
vortex'', {\it Journal of aircraft}, {\bf 43}, pp. 117-124 (2006).
\شماره٪٪۲۷
Nita, M. and Scholz, D. ``Estimating the oswald factor from basic
aircraft geometrical parameters'', {\it German Aerospace Congress 2012},
Berlin, Germany (2012).
\شماره٪٪۲۸
Phillips, W.F. S.R. Fugal, R.E. Spall, "Minimizing induced
drag with wing twist, computational-fluid-dynamics validation,"
Journal of Aircraft, vol. 43, pp. 437-444, 2006.
\شماره٪٪۲۹
Hoerner, S. ``Aerodynamic shape of the wing tips'', {\it Air Materiel
Command Wright-Patterson Afb Oh Eng