Open Access Open Access  Restricted Access Subscription Access

Effects of Chord Wise Flexibility of Flapping Wing on Aerodynamic Force Generation

Debopam Das

Abstract


In this work, the effect of flexibility of the wing is duly observed and the significance of this parameter at different Reynolds number and frequency ranges are well notified. It is seen that the in all or most of the cases of force generations the butterfly shaped wing gives the most efficient results, followed by the consistency of the rectangular wing of AR=2. The most rigid and the most flexible wings sometimes switch their efficiencies from maximum to low depending upon the Reynolds number ranges or the frequency of operation. But for a wider range of advance ratio it is very evident that the increase in flexibility or decrease in AR helps in producing more lift and thrust forces.

Full Text:

PDF

References


Abhijit Banerjee, Saurav K. Ghosh, and Debopam Das, “Aerodynamics of flapping wing at low reynolds numbers: force measurement and flow visualization,” ISRN Mechanical Engineering, vol. 2011, Article ID 162687, 8 pages, 2011. doi:10.5402/2011/162687

Ghosh, S.K., Dora, C., and Das, D. (2012). ”Unsteady Wake Characteristics of a Flapping Wing through 3D TR-PIV.” J. Aerosp. Eng. 25, SPECIAL SECTION: Intelligent Unmanned Systems, 547–558.

Zhao,L., Huang, Q., Deng, X., and Sane, S.P. (2010) “Aerodynamic effects of flexibility in flapping wings”. J. R. Soc. Interface 7, 485–497

Bhowmik, J.,Das, D., and Ghosh, S. K (2013) "Aerodynamic modelling of flapping flight using lifting line theory", International Journal of Intelligent Unmanned Systems, Vol. 1 Iss: 1, pp.36 – 61. Doi : 10.1108/20496421311298134

Kamakoti, R. & Shyy, W. (2004) “Fluid–structure interaction for aeroelastic applications”. Progr. Aerospace Sci. 40,535–558.

Shyy, W. (2008) “Computational aerodynamics of low Reynolds number plunging, pitching and flexible wings for MAV applications.” Acta Mech. Sinica 24, 351–373.

Wang, Z. J., Birch, J. M. & Dickinson, M. H. (2004). “Unsteady forces and flows in low Reynolds number hovering flight: two-dimensional computations vs robotic wing experiments”. J. Exp. Biol. 207, 449–460.

Dickinson, M. H., Lehmann, F. O. & Sane, S. P. (1999) “Wing rotation and the aerodynamic basis of insect flight”. Science 284, 1954–1960.

Sane, S. P. & Dickinson, M. H. (2001) “The control of flight force by a flapping wing: lift and drag production”. J.Exp. Biol. 204, 2607–2626.

Sane, S. P. & Dickinson, M. H. (2002) “The aerodynamic effects of wing rotation and a revised quasi-steady model of flapping flight”. J. Exp. Biol. 205, 1087–1096.

Lentink, D. and Dickinson, M. H. (2009). “Biofluiddynamic scaling of flapping, spinning and translating fins and wings”. J. Exp. Biol. 212, 2691-2704.

Ho, S., Nassef, H., Pornsinsirirak, N., Tai, Y. C. & Ho, C. M. (2003) “Unsteady aerodynamics and flow control for flapping wing flyers”. Progr. Aerospace Sci. 39, 635–681.

Du, Z. and Selig, M.S (1998). “Effect of rotation on the boundary layer of a wind turbine blade”. Bakerfield CA: American Wind Energy Association, Windpower Conference

Dumitrescu, H and Cardos, V. (2003). “Rotational effects on the boundary layer flow in wind turbines”. AIAA J. 42, 408-411.

Rival, D.,Prangemeirer, T., and Tropea, C. (2009) “The influence of airfoil kinematics on the formation of leading-edge vortices in bio-inspired flight”. Exp Fluids. 46, 423-433




DOI: http://dx.doi.org/10.21535%2FProICIUS.2013.v9.420

Refbacks

  • There are currently no refbacks.