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American Institute of Aeronautics and Astronautics 1 ENVIRONMENTAL IMPACT EVALUATION OF AIR TRANSPORT SYSTEMS THROUGH PHYSICAL MODELLING AND SIMULATION Muriel Brunet 1 and Thomas Chaboud2 Onera, France, Toulouse Nicolas Huynh3 Onera, France, Châtillon and Patrice Malbéqui4, Weeded Ghedhaifi5 Onera, France Châtillon The European air transport system, presently close to its limit, is facing the challenge of a continuously growing demand with a wish of sustainable and economically viable development. The air transport industry is aware that it needs in particular to significantly reduce its environmental impact. In this context, the Infrastructure for Evaluating Air Transport Systems (IESTA) aims to gather the multidisciplinary knowledge of the aeronautical research in physical modelling guarantying the ability of the evaluation platform to handle innovative concepts. Complementary to real time simulators with operator in the loop, IESTA intents to go further than existing evaluation platforms mainly based on existing software limited to current traffic modelling and simulation. The first application of IESTA is focused on the environmental (acoustic and chemical) impact of air traffic surrounding airports. The different kinds of acoustic and chemical results that IESTA can provide depending on user needs are presented here. I. Introduction HE Advisory Council for Aeronautics Research in Europe (ACARE) has strongly warned the aeronautical community that the European Air Transport System (ATS), presently close to its limit, is facing the challenge of a continuously growing demand with a wish of sustainable and economically viable development [1].

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ENVIRONMENTAL IMPACT EVALUATION OF AIR TRANSPORT SYSTEMS THROUGH PHYSICAL MODELLING AND SIMULATION

1 2 Muriel Brunet and Thomas Chaboud Onera, France, Toulouse

3 Nicolas Huynh Onera, France, Châtillon

and

4 5 Patrice Malbéqui , Weeded Ghedhaifi Onera, France Châtillon

The European air transport system, presently close to its limit, is facing the challenge of a continuously growing demand with a wish of sustainable and economically viable development. The air transport industry is aware that it needs in particular to significantly reduce its environmental impact. In this context, the Infrastructure for Evaluating Air Transport Systems (IESTA) aims to gather the multidisciplinary knowledge of the aeronautical research in physical modelling guarantying the ability of the evaluation platform to handle innovative concepts. Complementary to real time simulators with operator in the loop, IESTA intents to go further than existing evaluation platforms mainly based on existing software limited to current traffic modelling and simulation. The first application of IESTA is focused on the environmental (acoustic and chemical) impact of air traffic surrounding airports. The different kinds of acoustic and chemical results that IESTA can provide depending on user needs are presented here.

I.Introduction HE Advisory Council for Aeronautics Research in Europe (ACARE) has strongly warned the aeronautical community that the European Air Transport System (ATS), presently close to its limit, is facing the develoTpment [1]. challenge of a continuously growing demand with a wish of sustainable and economically viable The challenge is to accommodate the forecast increase in air traffic as well as reducing the relative impact of aviation with respect to noise and emissions. The ACARE has identified four goals to address the environmental challenge [1]: ·To reduce fuel consumption and CO2 emissions by 50%. ·To reduce perceived external noise by 50%. ·To reduce NOx by 80%. ·To make substantial progress in reducing the environmental impact of the manufacture, maintenance and disposal of aircraft and related products. The goals emphasize the efforts air transport industry needs to make in order to reduce the environmental impact in the following areas: 1 Long-term Design & Systems Integration Department, muriel.brunet@onera.fr 2 Long-term Design & Systems Integration Department, thomas.chaboud@onera.fr 3 Long-term Design & Systems Integration Department, nicolas.huynh@onera.fr 4 Numerical Flow Simulation & Aeroacoustics Department, patrice.malbequi@onera.fr 5 Physics & Instrumentation Department, weeded.ghedhaifi@onera.fr 1 American Institute of Aeronautics and Astronautics

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