A computational study on effect of pitch difference in pure plunging tandem wings

4th AEROTECH- Innovation in Aerospace Engineering and Technology

航空航天工程

Rasani, M.R.^1 ; Nuawi, M.Z.^1 ; Mahmood, W.M.F.W.^1 ; Harun, Z.^1

Jabatan Kejuruteraan Mekanik Dan Bahan, Fakulti Kejuruteraan Dan Alam Bina, Universiti Kebangsaan Malaysia, Bangi

43600, Malaysia^1

关键词: Aero-dynamic performance;    Arbitrary lagrangian-eulerian frameworks;    Computational studies;    Low Reynolds number;    Numerical results;    Pitch differences;    Tandem configuration;    Vortex interactions;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/152/1/012004/pdf
DOI  :  10.1088/1757-899X/152/1/012004

学科分类：航空航天科学

来源: IOP

【 摘 要 】

Flapping wing in tandem configuration may offer enhanced aerodynamic performance at low Reynolds number, in which micro air vehicles operate. The present study aims to investigate the effect of fore-hind wing pitch difference on the aerodynamic performance of tandem wings. To that end, two-dimensional, laminar flow around two thin flat airfoils that are sinusoidally plunging in phase with each other, were computationally simulated at a Reynolds number of 10000, using a flow solver in an Arbitrary Lagrangian-Eulerian framework. The fore wing pitch angle was fixed to 10°, while the hind wing pitch angle was varied between -10°, 0°, 10° and 20°. Numerical results shows that aerodynamic performance of the fore wing may be affected by the hind wing pitch angle and that tandem wings may offer improved lift to drag efficiency at some optimal fore-hind wing pitch difference compared to twice the results of a similar single wing case. In addition, the complex fore-hind wing vortex interaction is also affected by the hind wing pitch angle.