Page 14 - European Energy Innovation - Summer 2014
P. 14
Summer 2014 European Energy Innovation


Gearing up for Clean Sky 2

By Eric Dautriat

Greening skies by technological breakthroughs designing lightweight structures,
reducing the level of to reduce the environmental defining more efficient on-board
greenhouse gases footprint of aircraft. energy management, optimising
is a challenging task mission and trajectories.
for our generation. Air transport Since it was created in 2008, the
is currently responsible for 2% of Clean Sky Joint Undertaking Examples of large aircraft,
CO2 emissions. Yet, the sector has mobilised almost 600 large, regional aircraft, rotorcraft,
is forecasted to experience medium and small companies to engines, systems and eco-
sustained growth in the future and take part in this, the largest ever design are now available. One
by 2050 the figures will be much aeronautics research programme. flagship project of Clean Sky is
higher. The European aeronautics With some seventy percent of the counter-rotative open rotor.
industry is fully committed to the programme completed, Another is the wing natural
addressing both mobility and sixteen Calls for Proposals already laminarity demonstrator. In
environmental challenges. The launched and hundreds of topics addition to these, two full engine
European Union is a frontrunner covered, Clean Sky is well on demonstrators have already
when it comes to environmental track. At present, ‘testing’ is more been started: a large engine
protection: Clean Sky is the result and more a key word, with several (Trent family by Rolls-Royce),
of the common vision between important dedicated test facilities with new low-pressure spool and
the European Commission and ready to support on-ground integrated dressings, which will
the aeronautic sector to develop and in-flight demonstrations. be flight-tested this year, and a
Out of the many demonstrators turboshaft engine, aiming at a
Eric Dautriat of variable size to be run, the 15% CO2 reduction and a Diesel
first two are already a reality - a engine for light rotorcraft aiming
turboshaft engine and a large at a CO2 reduction of 35%.
aircraft engine.
Clean Sky also involves a series
PROMISING RESULTS of activities in the field of more
The progress of the electric aircraft, mainly focused
environmental objectives is on bleedless engine enabling
periodically monitored through technologies: development of
a “technology evaluator” at electrical environment control
different levels of aggregation: system technologies, anti-icing,
aircraft, airport, global fleet. de-icing electro-mechanical
Clean Sky is delivering the goals technologies and also, on a
initially set in details for each different mode, green taxiing.
category of aircraft; in summary it
is estimated that the technology Not least, Clean Sky is developing
developments already made or composite structures for
in progress could reduce aviation regional turboprop aircraft with
CO2 emissions by 20% to 30% a significant impact on aircraft
with respect to baseline levels, weight, leading to reduced fuel
i.e. the situation in the year 2000 consumption.
(an aggregate reduction of 2
to 3 billion tonnes of CO2 over CLEAN SKY 2 – HEADING EVEN
the next 35 years). Clean Sky FURTHER
is working in all technological With an even larger budget,
disciplines linked to its objectives, improved environmental goals,
i.e. most of the disciplines and an expected positive impact
involved in the aircraft design: on European competitiveness,
improving propulsive efficiency, Clean Sky 2 is ready to take off.
improving aerodynamics, The new programme involves
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