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Open AccessArticle

Exploitation of a Multifunctional Twistable Wing Trailing-Edge for Performance Improvement of a Turboprop 90-Seats Regional Aircraft

1
Department of Industrial Engineering (Aerospace Division), University of Naples “Federico II”, Via Claudio 21, 80125 Naples, Italy
2
ONERA, The French Aerospace Lab, Aerodynamic Aeroelasticity and Acoustics Department, 92190 Meudon, France
*
Author to whom correspondence should be addressed.
Aerospace 2018, 5(4), 122; https://doi.org/10.3390/aerospace5040122
Received: 4 October 2018 / Revised: 5 November 2018 / Accepted: 9 November 2018 / Published: 16 November 2018
Modern transport aircraft wings have reached near-peak levels of energy-efficiency and there is still margin for further relevant improvements. A promising strategy for improving aircraft efficiency is to change the shape of the aircraft wing in flight in order to maximize its aerodynamic performance under all operative conditions. In the present work, this has been developed in the framework of the Clean Sky 2 (REG-IADP) European research project, where the authors focused on the design of a multifunctional twistable trailing-edge for a Natural Laminar Flow (NLF) wing. A multifunctional wing trailing-edge is used to improve aircraft performance during climb and off-design cruise conditions in response to variations in speed, altitude and other flight parameters. The investigation domain of the novel full-scale device covers 5.15 m along the wing span and the 10% of the local wing chord. Concerning the wing trailing-edge, the preliminary structural and kinematic design process of the actuation system is completely addressed: three rotary brushless motors (placed in root, central and tip sections) are required to activate the inner mechanisms enabling different trailing-edge morphing modes. The structural layout of the thin-walled closed-section composite trailing-edge represents a promising concept, meeting both the conflicting requirements of load-carrying capability and shape adaptivity. Actuation system performances and aeroelastic deformations, considering both operative aerodynamic and limit load conditions, prove the potential of the proposed structural concept to be energy efficient and lightweight for real aircraft implementation. Finally, the performance assessment of the outer natural laminar flow (NLF) wing retrofitted with the multifunctional trailing-edge is performed by high-fidelity aerodynamic analyses. For such an NLF wing, this device can improve airplane aerodynamic efficiency during high speed climb conditions. View Full-Text
Keywords: twistable trailing-edge; Natural Laminar Flow wing; actuator torque; instant centre analysis; regional aircraft twistable trailing-edge; Natural Laminar Flow wing; actuator torque; instant centre analysis; regional aircraft
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MDPI and ACS Style

Rea, F.; Amoroso, F.; Pecora, R.; Moens, F. Exploitation of a Multifunctional Twistable Wing Trailing-Edge for Performance Improvement of a Turboprop 90-Seats Regional Aircraft. Aerospace 2018, 5, 122.

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