Proceedings Article10.2514/6.2014-2173
A Numerical Optimization Study on Winglets
Shahriar Khosravi,David W. Zingg +1 more
- 16 Jun 2014
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TL;DR: In this article, a gradient-based optimizer is used for aerostructural optimization of planar wings with winglets, where gradient gradients are calculated by the coupled discrete-adjoint method.
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Abstract: This paper focuses on aerostructural optimization of wings with winglets. A NewtonKrylov flow solver for the Euler equations is interfaced with a finite-element structures solver for the aerostructural solution. A gradient-based optimizer is used for optimization, where gradients are calculated by the coupled discrete-adjoint method. Pareto fronts of optimal solutions are constructed for weight and drag, which are competing objectives in the context of wing design. Three winglet configurations are considered: winglet-up, winglet-down, and raked wingtips. These are compared to optimized planar wings of the same span. The aerostructural optimization cases reveal that the winglet-down configuration provides the largest benefit in comparison to the optimized planar wings by increasing the span of the wing at the deflected state.
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Citations
High-Fidelity Aerodynamic Shape Optimization of a Lifting-Fuselage Concept for Regional Aircraft
Thomas A. Reist,David W. Zingg +1 more
TL;DR: In this article, high-fidelity aerodynamic shape optimization based on the Reynolds-averaged Navier-Stokes equations is used to optimize the aerodynamic performance of a conventional tube-and-wing design, a hybrid.
41
Euler-Equation-Based Drag Minimization of Unconventional Aircraft Configurations
Hugo Gagnon,David W. Zingg +1 more
TL;DR: In this paper, the potential of unconventional aircraft transports through numerical optimization is investigated: a box wing, a C-tip blended wing-body, and a braced wing, each transport is sized for the same regional mission and is subjected to the same optimization strategy based on the Euler equations.
37
Aerodynamic optimization of civil aircraft with wing-mounted engine jet based on adjoint method
TL;DR: In this paper, an engine jet simulation method based on the isentropic relations and sonic formula is developed to study the effect of engine jet on the aircraft exterior flowfield, which is integrated into the high-fidelity optimization framework aiming at aerodynamic optimization of the civil aircraft with wing-mounted engine.
25
Aerostructural Perspective on Winglets
Shahriar Khosravi,David W. Zingg +1 more
TL;DR: In this article, an aerostructural perspective on the potential benefits of wingletted wings in comparison to planar wings of the same projected span is presented, and the potential benefit of wingleted wings is compared with planar planes.
22
Aerodynamic Design of Blended Wing-Body and Lifting-Fuselage Aircraft
Thomas A. Reist,David W. Zingg +1 more
- 13 Jun 2016
TL;DR: High-fidelity aerodynamic shape optimization based on the Reynolds-averaged NavierStokes equations is used to optimize the aerodynamic performance of conventional and blended wing-body (BWB) aircraft for a range of aircraft sizes from regional to wide-body classes.
20
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