AGEAIR II: Investigation of gaseous and particulate emissions of in-service AIRcraft and helicopter turbine engines, as well as the effects of performance deterioration of AGEing aircraft engines
At a glance
All combustion engines emit a wide range of toxic emissions. On
one hand, the gaseous fraction contains mostly nitrous gases (NOx),
carbon monoxide, hydrocarbons and sulfur dioxide. Thanks to ICAO
regulations, NOx emissions have substantially decreased in recent
years, especially by optimizing the combustion process. On the
other hand, characteristics of the non-volatile particulate matter
fraction (nvPM) changed significantly, as the mean aerodynamic
diameter decreased from large fractions (1-10 µm) to an ultrafine
fraction (< 100 nm). The currently established measurement
principles, regulated in ICAO Annex 16, Volume 2, are therefore
becoming more and more useless when measuring nvPM. To this end,
the Swiss Mobile Aircraft Engine Emissions Measurement System
SMARTEMIS, a new, robust, industrial-grade nvPM and gaseous
emission measurement system has been developed jointly between Empa
and FOCA. SMARTEMIS can quantify nvPM emissions to a hitherto
hardly reached degree. This made it possible to define a new nvPM
certification standard, which will come into action for all
turbofan engines with thrust > 26.7 kN from 2020 on. Yet,
smaller turbofan, all turboprop and all turboshaft engines still
lack any stricter regulation. Moreover, the exhaust characteristics
of such engines is still largely unknown. As well, the detrimental
effects of engine deterioration onto exhaust composition has not
yet been quantified.
AGEAIR I and II wants to address these two problems:
During the project AGEAIR I (06/2016-03/2020), SMARTEMIS will be used to gather first data quantifying the engine deterioration effects of large turbofan engines (> 26.7 kN thrust) on pollutant emissions. This measured data will be used to develop a first version of an engine deterioration model predicting changes in the engine exhaust. During AGEAIR II (01/2020-12/2022), we will validate the model with further measurements and start assessing the exhaust gas composition of turboprop and turboshaft engines of small to medium-sized helicopter and turboprop planes. The findings will i) complement engine emission datasets to generate a comprehensive aviation emission inventory, ii) generate a base of discussion for future regulatory actions for small turbine engine emissions and iii) help understanding the combustion processes of small turbine engines
Environmental Science & Technology.
Available from: https://doi.org/10.21256/zhaw-23310
Book of abstract for the 2021 European Aerosol Conference.
European Aerosol Conference (EAC2021), online, 30 August - 3 September 2021.
The Aerosol Society.
Available from: https://doi.org/10.21256/zhaw-23332