12th EASN International Conference Technical Sessions



Dr. Christos Vasilakos
Clean Aviation Joint Undertaking
Clean Aviation’s Synergies with European, national and regional programmes

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Dr. Jean-François Brouckaert
Clean Aviation Joint Undertaking
Clean Sky 2 Special Session on Thematic Topics


This special session will feature presentations from all thematic projects launched and funded by the Clean Sky 2 Joint Undertaking.

These projects have been selected from several Thematic Calls addressing targeted low TRL topics in relation to technology gaps for demonstrators / High Level Objectives of Clean Sky 2. 14 Topics have been published over 4 Calls over 3 years (2018-2020) and resulted in 23 projects funded for overall funding of ~ 34 M€ (~2% of CS2 Funding). Most of the projects were tasked with establishing clear State-of-the-Art and a technology roadmap on various topics of interest as precursors to the Clean Aviation ambition. These topics range from advanced low NOx combustion technologies, to hybrid-electric aircraft architecture and components, high aspect ratio wings, or acoustics of distributed propulsion configurations, and the like. All projects have an advisory board which enables any interested parties to follow the project more closely. 

Dr. Jean-François Brouckaert
Clean Aviation Joint Undertaking
Clean Sky 2 Technology Evaluator Session on Aircraft Concepts


This special session will focus on the presentation of the CS2 Aircraft Concepts. Those have been presented in detail in the 1st Clean Sky 2 TE Global Assessment ( and include a set of technologies developed under the ITDs/IADPs of the programme. All aircraft concepts have undergone an update in terms of technology inclusion or architecture choice and a revision loop of environmental performance estimate at the mission level. These updated vehicle models will serve as a basis for the subsequent airport and fleet predictions of the 2nd TE Global Assessment due in 2024, at the closure of the CS2 Programme.

Mrs. Ligeia Paletti (NLR), Mr. Marcello Kivel Mazuy (CIRA) & Dr.-Ing. Christian Eschmann (DLR)
EREA: Association of European Research Establishments in Aeronautics
Urban Air Mobility Extended Workshop

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Urban Air Mobility (UAM) has gained popularity in the past decade as the next revolution for mobility. It promises to be a more efficient and sustainable form of transport, using the unutilized airspace in urban environments to improve services and mobility. It promises to contribute to a climate-neutral air transport system, without compromising on safety and security and while respecting the societal concerns on noise and pollution.  
But how can UAM system and solutions be designed and demonstrated to be the efficient and sustainable mode of transport it is advertised to be?
In three workshops, different aspects are presented, which need to be considered for UAM to become a reality, in the current societal context focused on sustainability, efficiency and social acceptance. The workshops aim at creating awareness of the challenges embedded in UAM and identifying possible solutions to be investigated further, in a collaborative spirit which includes universities and research establishments, all other aviation stakeholders, and the citizens.

Workshop I: Circular Aviation System

Chairwoman: Mrs. Ligeia Paletti (NLR)
There is currently a lot of buzz around “Circular Economy”, especially following its connection with the EU Green Deal. Yet, what Circular Economy really means and entails are aspects still elusive for many. In general, it is thought that Circular Economy has “something to do with” recycling: recycling of materials (like recycled plastic). In some cases, Circular Economy has “something to do with” reusing things: second hand products or finding new uses for parts (like chairs from car seats).
Circular Economy encompasses those aspects, and more. Circular Economy is defined as a “system solutions framework”. When the system considered is Aviation, the Circular Economy becomes one framework to define solutions which will contribute to the goal of climate-neutral aviation by 2050 and to the other goals expressed in the ACARE Vision.
In this workshop, the participants will take an active role in creating an ideal (UAM) Air Transport System which is circular and in alignment with the goals of the EU Green Deal.

Workshop II: Future Energy Sources for Aviation

Chairman: Mr. Marcello Kivel Mazuy (CIRA)
Hybrid Electric Propulsion (HEP), H2 and in general Sustainable Aviation Fuels (SAF) are widely considered as the most promising and sustainable solutions for an energy efficient, green and quieter aeronautical propulsion. Despite this, several goals must be still achieved to make these technologies viable. In particular, the propulsion system integration into the A/C and the overall feeding system, including new challenges as electric and thermal Management, are key issues to be solved for an acceptable technology shift. Also, we can just think for example of the ‘weight issue’. 
However, the ‘greening’ effect of future energy sources for aviation implies new challenges. If CO2 emissions of aviation are well established and their impact on climate (radiative forcing) can be reasonably well quantified, non-CO2 impact and noise might be considered as well.  In general, for current air transport applications non-CO2 emissions impact (NOx, contrails) on radiative forcing remains widely uncertain (but know as significant) and noise issues for new disruptive configurations also to be assessed. 
These uncertainties become more important for the new and unknown future UAM scenario. For example, what about the psychological effects of this new swarm noise above people heads? What is the increased level of humidity due to the water vapor, and consequent combination with other exhausts, in the city?  
The overall scope of the workshop is to assess in an ideal urban context such innovative propulsion solutions, both in terms of technologies and configurations, on a wide spectrum, from applicability to safety/security till social acceptance issues, by thinking outside the box with fresh and open-minded academic skills. Potential links with a circular approach and scaled demonstration will be also addressed in order to provide additional food for thoughts for the other workshops. 

Workshop III: Scaled Demonstrators

Chairman: Dr.-Ing. Christian Eschmann (DLR)
In aeronautical research, infrastructures make an essential contribution to technology development. For decades, classic large-scale facilities, such as wind tunnels, have been used for this purpose, but recently simulators of all kinds or entire high-performance clusters have also been increasingly employed. Since the construction and maintenance of such facilities is very personnel- and cost-intensive, the European Commission has been pursuing a more efficient and uniform approach for infrastructures across Europe. In the case of UAM, these are primarily UAS (unmanned aerial system) test centres for conducting extensive flight test campaigns. In this context, scaled demonstrators are becoming an increasingly important tool for flight tests, as well as for design and validation.
Scaled demonstrators are scaled-down models of the intended future aircraft and serve as realistic flight test vehicles. However, this is not only about low TLR research, but also about the scaled testing of individual technology components (such as sensors), through sub-systems to entire systems.
In the workshop, the entire spectrum of potential applications for scaled demonstrators will be presented - from current, existing test vehicles to possible future configurations.