Objective The AvAUNT proposal seeks to advance the state-of-the-art in understanding of the aerodynamic interference challenges associated with the Ultra High Bypass Ratio (UHBR) nacelle with an integrated Adaptable Area Nozzle (AAN) to Technology Readiness Level 4. The move towards higher bypass ratios can lead to significant reductions in emissions and noise; up to 10% propulsive efficiency enhancement and 2dB noise reductions from UHBR ~15 and above reported. However, by lowering fan pressure ratios, fan surge problems can emerge with increasingly larger variations in flight performance between sea-level and cruise. To overcome this, the adaptive area nozzle can provide the necessary increases in surge margin at low mass flow conditions at sea-level, but at the expense of additional system weight and complexity. While many of the potential benefits of the UHBR configuration have been substantiated for isolated nacelle configurations, there is limited understanding of the installation interference effects that will be induced at these very high/ultra high ratios, or how the incorporation of the AAN may affect the nature of these interference losses. In the current project, early stage candidate concepts for a nacelle with AAN technology will be studied through complementary experimental and computational simulation to ascertain the interference effects induced and to propose a verified modelling methodology which can be used in advance design studies. This will be used to inform best practice in the design of installed UHBR nacelles with AAN technology to support a move towards an integrated technology demonstrator within the Clean Sky 2 Joint Undertaking for late 2023. Fields of science engineering and technologymechanical engineeringvehicle engineeringaerospace engineeringaircraftengineering and technologymechanical engineeringvehicle engineeringaerospace engineeringaeronautical engineeringengineering and technologyenvironmental engineeringenergy and fuels Programme(s) H2020-EU.3.4. - SOCIETAL CHALLENGES - Smart, Green And Integrated Transport Main Programme H2020-EU.3.4.5.1. - IADP Large Passenger Aircraft Topic(s) JTI-CS2-2016-CFP03-LPA-01-16 - Aerodynamic Isolated and Installed Methods for UHBR Adaptable Area Nozzles Call for proposal H2020-CS2-CFP03-2016-01 See other projects for this call Funding Scheme CS2-IA - Innovation action Coordinator AIRCRAFT RESEARCH ASSOCIATION LIMITED Net EU contribution € 1 351 595,10 Address Manton lane MK41 7PF Bedford United Kingdom See on map Region East of England Bedfordshire and Hertfordshire Bedford Activity type Research Organisations Links Contact the organisation Opens in new window Website Opens in new window Participation in EU R&I programmes Opens in new window HORIZON collaboration network Opens in new window Other funding € 0,00 Participants (2) Sort alphabetically Sort by Net EU contribution Expand all Collapse all THE QUEEN'S UNIVERSITY OF BELFAST United Kingdom Net EU contribution € 332 711,25 Address University road lanyon building BT7 1NN Belfast See on map Region Northern Ireland Northern Ireland Belfast Activity type Higher or Secondary Education Establishments Links Contact the organisation Opens in new window Website Opens in new window Participation in EU R&I programmes Opens in new window HORIZON collaboration network Opens in new window Other funding € 0,00 ROHR AERO SERVICES LIMITED United Kingdom Net EU contribution € 46 014,50 Address 1 dow avenue KA9 2SA Prestwick See on map Region Scotland Southern Scotland South Ayrshire Activity type Private for-profit entities (excluding Higher or Secondary Education Establishments) Links Contact the organisation Opens in new window Participation in EU R&I programmes Opens in new window HORIZON collaboration network Opens in new window Other funding € 19 720,50
