Optimization of flapping motion of airfoils in biplane configuration for maximum thrust and/or efficiency

Date

2007-01-01

Author

Kaya, Mustafa
Tuncer, İsmail Hakkı
Jones, Kevin D.
Platzer, Max F.

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Flapping motion of airfoils in a biplane configuration are optimized for maximizing the thrust and propulsive efficiency. Unsteady flowfields over airfoils flapping in a combined plunge and pitch are computed with a parallel viscous flow solver on moving and deforming overset grids. The amplitudes of the sinusoidal pitch and plunge motions and the phase shift between them are optimized at a fixed flapping frequency and average distance between two airfoils. A gradient based optimization algorithm is implemented in a parallel computing environment. The deforming overset grids remove the restrictions on the flapping motion, and improve the optimization results obtained earlier. At low flapping frequencies, an airfoil in a biplane configuration produces more thrust than a single airfoil. Yet, at high frequencies the airfoil in biplane configuration produced less thrust at a significantly lower efficiency than the single airfoil.

URI

https://hdl.handle.net/11511/57289

DOI

https://doi.org/10.2514/6.2007-484

Collections

Department of Aerospace Engineering, Conference / Seminar

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Optimization of Flapping Motion Parameters for Two Airfoils in a Biplane Configuration Kaya, Mustafa; Tuncer, İsmail Hakkı; Jones, Kevin D.; Platzer, Max F. (American Institute of Aeronautics and Astronautics (AIAA), 2009-03-01) Flapping motion parameters of airfoils in a biplane configuration are optimized for maximum thrust and/or propulsive efficiency. Unsteady, viscous flowfields over airfoils flapping in a combined plunge and pitch are computed with a parallel flow solver on moving and deforming overset grids. The amplitudes of the sinusoidal pitch and plunge motions and the phase shift between them are optimized for a range of flapping frequencies. A gradient-based optimization algorithm is implemented in a parallel computing...
Optimization of aeroelastic flapping motion of thin airfoils in a biplane configuration for maximum thrust Kaya, Mustafa; Tuncer, İsmail Hakkı; Jones, Kevin D.; Platzer, Max F. (2007-01-01) An aeroelastic flapping motion of thin airfoils in a biplane configuration is optimized for maximum thrust. Airfoils are attached to swing arms by an elastic joint, which is model led by a torsional spring. A spring-mass system is employed for the aeroelastic coupling. The stiffness coefficient and the mass moment of inertia of the airfoil are optimized for maximum thrust. A gradient based optimization method is employed in a parallel computing environment. Unsteady, low speed flows are computed in parallel...
Path optimization of flapping airfoils based on unsteady viscous flow solutions Kaya, Mustafa; Tuncer, İsmail Hakkı; Department of Aerospace Engineering (2008) The flapping path of a single airfoil and dual airfoils in a biplane configuration is optimized for maximum thrust and/or propulsive efficiency. Unsteady, low speed viscous flows are computed using a Navier-Stokes solver in a parallel computing environment. A gradient based algorithm and Response Surface Methodology (RSM) are employed for optimization. The evaluation of gradient vector components and the design of experiments for RSM, which require unsteady solutions, are also carried out in parallel. Paral...
Optimization of flapping airfoils for maximum thrust and propulsive efficiency Tuncer, İsmail Hakkı; Kaya, Muhammed Çağrı (2005-11-01) The thrust and/or propulsive efficiency of a single flapping airfoil is-maximized by using a numerical optimization method based on the steepest ascent. The flapping motion of the airfoil is described by a combined sinusoidal plunge and pitching motion. Optimization parameters are taken to be the amplitudes of the plunge and pitching motions and the phase shift between them at a fixed flapping frequency. Two-dimensional, unsteady, low-speed, laminar, and turbulent flows are computed by using a Navier-Stokes...
Non-sinusoidal path optimization of dual airfoils flapping in a biplane configuration KAYA, MUHAMMED ÇAĞRI; Tuncer, İsmail Hakkı (2009-10-12) The path of dual airfoils in a biplane configuration undergoing a combined, non-sinusoidal pitching and plunging motion is optimized for maximum thrust and/or propulsive efficiency. The non-sinusoidal, periodic flapping motion is described using Non-Uniform Rational B-Splines (NURBS). A gradient based algorithm is then employed for the optimization of the NURBS parameters. Unsteady, low speed laminar flows are computed using a Navier-Stokes solver in a parallel computing environment based on domain decompos...

Citation Formats

M. Kaya, İ. H. Tuncer, K. D. Jones, and M. F. Platzer, “Optimization of flapping motion of airfoils in biplane configuration for maximum thrust and/or efficiency,” 2007, vol. 9, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/57289.