ROSAS Wind Tunnel Test Campaign Dedicated to Unconventional Aircraft Concepts Study

Ricouard, Julien; Davy, Renaud; Loheac, Pierre; Moore, Alastair; Piccin, Olivier

doi:10.2514/6.2004-2867

Cited by 13 publications

(10 citation statements)

References 2 publications

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“…Reducing the noise levels around airports remains a key issue due to traffic increase, even if aircraft is more and more silent. However, it seems that a new gap cannot be expected keeping the present technology and several novel airplane concepts are considered for the next decades [58,24]. The shielding of turbofan noise with fuselage, wings or stabilizer could be beneficial for sound pressure radiated towards the ground [56].…”

Section: Effects Of Aircraft Engine Installation On Ground Sound Presmentioning

confidence: 99%

Aeroacoustics research in Europe: The CEAS-ASC report on 2014 highlights

Detandt¹

2015

Journal of Sound and Vibration

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The Council of European Aerospace Societies (CEAS) Aeroacoustics Specialists Committee (ASC) supports and promotes the interests of the scientific and industrial aeroacoustics community on an European scale and European aeronautics activities internationally. Each year the committee highlights some of the research and development projects in Europe. This paper is the 2014 issue of this collection of Aeroacoustic Highlights, compiled from informations submitted to the CEAS-ASC. The contributions are classified in different topics; the first categories being related to specific aeroacoustic challenges (airframe noise, fan and jet noise, helicopter noise, aircraft interior noise) and two last sections are respectively devoted to recent improvements and emerging techniques and to general advances in aeroacoustics. For each section, the present paper focus on accomplished projects, providing the state of the art in each research category in 2014. A number of research programmes involving aeroacoustics were funded by the European Commission. Some of the highlights from these programmes are summarised in this paper, as well as highlights funded by national programmes or by industry.

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Section: Effects Of Aircraft Engine Installation On Ground Sound Presmentioning

confidence: 99%

Aeroacoustics research in Europe: The CEAS-ASC report on 2014 highlights

Detandt¹

2015

Journal of Sound and Vibration

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“…For minimum exterior noise signature, the engines are mounted over the rear fuselage. The choice for this layout was supported by results of a detailed analysis of shielding engine noise with the airframe structure [5,7]. Based on the multiple-input multiple-output (MIMO) control strategy results obtained, the structure of the ACFA 2020 aircraft configuration will be resized to demonstrate the potential weight benefit achieved by active control.…”

Section: Project Concept and Objectivesmentioning

confidence: 99%

Design of a 450-passenger blended wing body aircraft for active control investigations

Mohr

Paulus

Baier

et al. 2011

Proceedings of the Institution of Mechanical Engineers, Part G:

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ACFA 2020 (active control for flexible aircraft) is a collaborative research project funded by the European Commission under the seventh research framework programme. The project deals with innovative active control concepts for 2020 aircraft configurations like the blended wing body (BWB) aircraft. The main objectives of ACFA are the design of a new ultra efficient 450 passenger BWB type aircraft as well as the provision of robust adaptive multichannel control architectures for such aircraft. The objective of the newly designed controllers is an ambitious improvement of ride comfort and handling qualities, as well as load reduction on BWB type aircraft. Based on the attained load reduction, the structure of the 450-passenger aircraft can be resized with the goal of an ambitious weight saving for further improvement of fuel efficiency. Active control requirements influence the design process of control surfaces and overall aircraft design, respectively. Hence, the conventional aircraft design process had to be adapted to the new requirements. The aircraft design framework described in this article has proven its efficiency in the development of the ACFA BWB aircraft. Within a time period of 1 year, an airframe has been developed under the constraints of multiple domain requirements. This article presents the process and the results of the design activities of the BWB aircraft, which form the basis for a detailed concept analysis as well as the investigation of multiple-input multipleoutput control architectures.

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“…In the latter case, successful experiences are only a few cases including the recent Honda Business jet [1]. The Over-the-Wing-Nacelle (OWN) configuration has a potential to reduce the noise drastically because the wing can block the propagation of fan and jet noises toward ground [2]. However, when the engine nacelles are installed over the wing, the aerodynamic performance tends to drop significantly due to the interference effect.…”

Section: Introductionmentioning

confidence: 99%

Aerodynamic Optimization of an Over-the-Wing-Nacelle-Mount Configuration

Sasaki

Nakahashi

2011

Modelling and Simulation in Engineering

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An over-the-wing-nacelle-mount airplane configuration is known to prevent the noise propagation from jet engines toward ground. However, the configuration is assumed to have low aerodynamic efficiency due to the aerodynamic interference effect between a wing and a nacelle. In this paper, aerodynamic design optimization is conducted to improve aerodynamic efficiency to be equivalent to conventional under-the-wing-nacelle-mount configuration. The nacelle and wing geometry are modified to achieve high lift-to-drag ratio, and the optimal geometry is compared with a conventional configuration. Pylon shape is also modified to reduce aerodynamic interference effect. The final wing-fuselage-nacelle model is compared with the DLR F6 model to discuss the potential of Over-the-Wing-Nacelle-Mount geometry for an environmental-friendly future aircraft.

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ROSAS Wind Tunnel Test Campaign Dedicated to Unconventional Aircraft Concepts Study

Cited by 13 publications

References 2 publications

Aeroacoustics research in Europe: The CEAS-ASC report on 2014 highlights

Aeroacoustics research in Europe: The CEAS-ASC report on 2014 highlights

Design of a 450-passenger blended wing body aircraft for active control investigations

Aerodynamic Optimization of an Over-the-Wing-Nacelle-Mount Configuration

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