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Conceptual design of PrandtlPlane civil transport aircraft

机译：Prandtlplane民用运输机的概念设计

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According to aircraft manufacturers and several air transportation players, the main challenge the civil aviation will have to deal with in the future is to provide a sustainable growth strategy, in order to face the growing demand of air traffic all over the world. The sustainability requirements are related to air pollution, noise impact, airport congestion, competitiveness of the air transportation systems in terms of travel time and passengers' comfort. Among the possible ways to allow a sustainable growth of the air transportation systems, disruptive aircraft configurations have been object of study for several years, in order to demonstrate that the improvement of aircraft performance can enable the envisaged growth. This paper presents the study of a possible novel configuration called "PrandtlPlane," having a box-wing layout derived from Prandtl's "Best Wing System" concept. The paper deals with the definition of top level requirements and faces the conceptual study of the overall configuration, focusing on fuselage sizing as well as on the aerodynamic design of the box-wing system. This latter is designed through an optimization-driven strategy, carried out by means of a low-fidelity aerodynamic tool, which simulates the flow condition in the subsonic range and introduces corrections to take the transonic effects into account. Design procedures and tools are presented, showing preliminary results related to a PrandtlPlane compliant with ICAO Aerodrome Reference Code "C" standard, such as Airbus A320 and Boeing 737, whose wingspan is limited to 36 m. Activities and results here shown are part of the first phase of the research project "PARSIFAL" (Prandtlplane ARchitecture for the Sustainable Improvement of Future AirpLanes), funded by the European Commission under the Horizon 2020 Program, which aims to demonstrate that the PrandtlPlane configuration can improve aircraft payload capability, keeping their dimensions compatible with present airport infrastructures.
机译：根据飞机制造商和几个航空运输球员，民航将要在未来应对的主要挑战是提供可持续增长战略，以面对世界各地的空中交通不断增长的需求。可持续性要求与空气污染，噪声影响，机场拥塞，航空运输系统方面的竞争力在旅行时间和乘客的舒适方面。在允许空运系统的可持续增长的可能方法中，颠覆性飞机配置已经研究了几年的研究，以证明飞机性能的改善可以实现设想的增长。本文介绍了一个可能的新颖配置，称为“prandtlane”，具有源自Prandtl的“最佳翼系统”概念的箱翼布局。本文涉及顶级要求的定义，并面临整体配置的概念研究，专注于机身尺寸以及箱翼系统的空气动力学设计。该后者通过优化驱动的策略设计，通过低保真空气动力学工具进行，该工具模拟亚音速范围内的流动条件，并引入校正以考虑跨音效应。提出了设计程序和工具，显示了与ICAO Aquodrome参考码“C”标准符合普通人符合普朗特的初步结果，例如空中客车A320和波音737，其翼展限制在36米。显示的活动和结果显示是研究项目的第一阶段的一部分“Parifal”（Parifal“（Prandtlplane建筑为未来飞机可持续改进），由欧洲委员会在地平线2020计划下资助，旨在证明Prandtlane配置可以提高飞机有效载荷能力，保持其尺寸与现在的机场基础架构兼容。

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