The Lifting System of a PrandtlPlane, Part 3: Structures Made in Composites

Frediani, Aldo; Quattrone, Flavio; Contini, Francesco

doi:10.1007/978-1-4614-2435-2_11

Cited by 16 publications

(8 citation statements)

References 5 publications

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“…Similar guidelines were also given by Wolkovitch [10], who, working on the joined wing, 1 added that the e ective beam depth of such systems is primarily determined by airfoil chord rather than thickness. Other studies that focus on the structural implications of box wings include [11] and [12].…”

mentioning

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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confidence: 99%

Aerodynamic Optimization Trade Study of a Box-Wing Aircraft Configuration

Gagnon

Zingg

2016

Journal of Aircraft

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“…The structural and aeroelastic problems of the lifting systems have been studied in the past, and some results are also reported in this book [9,10,12]; these studies indicate a high structural efficiency of the present solution.…”

Section: Civil Transport 250-seat Categorymentioning

confidence: 72%

The PrandtlPlane Configuration: Overview on Possible Applications to Civil Aviation

Frediani

Cipolla

Rizzo³

2012

Springer Optimization and Its Applications

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“…Since the original structural configuration was first modeled with beam elements, and, later, a detailed full wing-box model was designed (as shown in Frediani et al, 2012;Quattrone and Contini, 2010), and since the focus of the present effort is towards a conceptual work, it has been decided to build an "equivalent" shell structure describing only the mid- surface. In order to match the properties of the structures in terms of modes, different preliminary approaches have been investigated.…”

Section: Equivalence Processmentioning

confidence: 99%

“…This model was obtained through a partial multidisciplinary optimization (MDO) and then progressively fine-tuned (Buttazzo and Frediani, 2012;Dal Canto, 2009;Divoux, 2008;Quattrone and Contini, 2010;Frediani et al, 2012).…”

Section: Contribution Of the Present Studymentioning

confidence: 99%