High-Fidelity Aerostructural Optimization with Integrated Geometry Parameterization and Mesh Movement

Zhang, Jenmy Zimi; Khosravi, Shahriar; Zingg, David W.

doi:10.2514/6.2015-1132

Cited by 7 publications

(1 citation statement)

References 33 publications

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“…The coupling between the aerodynamic and structural forces is strong in wing design, especially in the case of the BW due to its structurally overconstrained nature and potential for snap buckling [12]. While a full aerostructural shape optimization [20] is beyond the scope of this work, here we consider the center-plane bending moment as a surrogate for a structural model [21]. Specifically, the x-directional moment, M x , about the center of gravity is constrained to be no more than 80% of the bending moment generated by the same configuration optimized without a bending moment constraint.…”

Section: Constraintsmentioning

confidence: 99%

Aerodynamic Optimization Trade Study of a Box-Wing Aircraft Configuration

Gagnon

Zingg

2016

Journal of Aircraft

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This study investigates the aerodynamic trade-o s of a box-wing aircraft configuration using highfidelity aerodynamic optimization. A total of five optimization studies are conducted, where each study extends the previous one by progressively adding a combination of design variables and constraints. Examples of design variables include wing twist and sectional shape; examples of constraints include trim and stability requirements. In all cases the objective is to minimize inviscid drag at a prescribed lift and a Mach number of 0.78. Aerodynamic functionals are evaluated based on the discrete solution of the Euler equations, which are tightly coupled with an adjoint methodology incorporating a gradient-based optimizer. For each study an equivalent conventional tube-and-wing baseline is similarly optimized in order to enable direct comparisons. It is found that the transonic box-wing aircraft considered here, whose height-to-span ratio is about 0.2, produces up to 43% less induced drag than its conventional counterpart. The unique capability of the box wing to redistribute its optimal lift distribution contributes significantly to this benefit as it enables trim and other constraints to be satisfied with almost no performance degradation. The impact of nonlinear aerodynamics on the box wing is explored further through a series of subsonic optimization studies.

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Section: Constraintsmentioning

confidence: 99%

Aerodynamic Optimization Trade Study of a Box-Wing Aircraft Configuration

Gagnon

Zingg

2016

Journal of Aircraft

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High-fidelity aerostructural optimization with integrated geometry parameterization and mesh movement

Zhang

Khosravi

Zingg

2016

Struct Multidisc Optim

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High-Fidelity Aerodynamic Shape Optimization of a Lifting-Fuselage Concept for Regional Aircraft

Reist

Zingg

2017

Journal of Aircraft

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High-fidelity aerodynamic shape optimization based on the Reynolds-averaged Navier-Stokes equations is used to optimize the aerodynamic performance of a conventional tubeand-wing design, a hybrid wing-body (HWB), and a novel lifting-fuselage concept for regional-class aircraft. Trim-constrained drag minimization is performed on an HWB design, with an optimized conventional design serving as a performance reference. The optimized regional-class HWB yields no drag savings when compared to the conventional reference aircraft. Starting from the optimized HWB, an exploratory optimization with significant geometric freedom is then performed, resulting in a novel shape with a slender lifting fuselage and distinct wings. Based on this exploratory result, a new regional-class lifting-fuselage configuration is designed and optimized. With a span constrained by code 'C' gate limits and having the same wing-only span as the conventional reference aircraft, this new design produces up to 10% lower drag than the reference aircraft. The e↵ect of structural weight uncertainties, cruise altitude, and stability requirements are also examined. Nomenclature CTW Conventional tube-and-wing HWB Hybrid wing-body LFC Lifting-fuselage configuration x, y, z Streamwise, spanwise and vertical coordinates ⇤ Ph.D. Candidate, AIAA Student member,

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High-Fidelity Aerostructural Optimization with Integrated Geometry Parameterization and Mesh Movement

Cited by 7 publications

References 33 publications

Aerodynamic Optimization Trade Study of a Box-Wing Aircraft Configuration

Aerodynamic Optimization Trade Study of a Box-Wing Aircraft Configuration

High-fidelity aerostructural optimization with integrated geometry parameterization and mesh movement

High-Fidelity Aerodynamic Shape Optimization of a Lifting-Fuselage Concept for Regional Aircraft

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