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AdaptiVe Area nozzle for Ultra high bypass Nacelle Technology

Total Cost €


EC-Contrib. €






Project "AvAUNT" data sheet

The following table provides information about the project.


Organization address
address: MANTON LANE
postcode: MK41 7PF

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country United Kingdom [UK]
 Project website
 Total cost 1˙781˙338 €
 EC max contribution 1˙730˙320 € (97%)
 Programme 1. H2020-EU. (IADP Large Passenger Aircraft)
 Code Call H2020-CS2-CFP03-2016-01
 Funding Scheme CS2-IA
 Starting year 2017
 Duration (year-month-day) from 2017-04-01   to  2020-03-31


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
2    THE QUEEN'S UNIVERSITY OF BELFAST UK (BELFAST) participant 332˙711.00
3    ROHR AERO SERVICES LIMITED UK (PRESTWICK) participant 119˙040.00


 Project 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.


List of deliverables.
PEDR - Plan for Exploitation & Dissemination of Results Documents, reports 2020-04-24 02:16:08

Take a look to the deliverables list in detail:  detailed list of AvAUNT deliverables.

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The information about "AVAUNT" are provided by the European Opendata Portal: CORDIS opendata.

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