The project ARTEM is set up in order to help closing the gap between noise reductions obtained by current technologies as already applied or being matured in large technology projects such as OpenAir and CleanSky and the long-term goals of ACARE, i.e. a noise reduction of 65% for each aircraft operation in year 2050 compared to the reference year 2000 value.
Therefore, ARTEM takes up innovative ideas and concepts for efficient noise reduction by novel liner concepts and investigates the potential of dissipative surfaces as encountered with the development of meta-materials. The aim is to develop those “Generation 3” noise reduction technologies (NRTs) to a technology readiness level (TRL) of 3 (experimental proof of concept) to 4 (technology validated in lab).
Within the project it is taken into account, that future aircrafts, anticipated to be introduced between 2035 and 2050, might have different configurations than the current tube-and-wing design with underwing –mounting of the engines. For 2035, the tube-and-wing layout could persist while the engine placement might differ, e.g. being semi-buried in the fuselage. For the 2050 time frame, blended wing-body aircrafts with very high bypass ratio (BPR≥16) may power long-range aircrafts, while regional aircrafts might exhibit hybrid propulsion systems or distributed electric propulsion system. The noise signature of the anticipated configurations will be strongly influenced by the interaction of several aircraft components: the interaction of airframe, high-lift-system, and propulsive jet of the engine(s), the interaction of airframe and engine inlet, the interaction of the landing gear with the airframe. These effects – which directly involve the noise generation - will be investigated in dedicated experiments and high-fidelity numerical calculations.
The methods, designs, and low noise technologies developed during ARTEM will be applied to the anticipated novel aircraft configurations, and the impact with respect to the noise signature will be investigated in several ways:
Assessment of 2035-2050 configurations with installed low noise technology and impact of fleet change
Prediction of impact on the ground (noise mapping for airport scenario)
Auralization and human perception of novel aircraft concepts with low noise technology
Assessment ofnovel noise reductiontechnologies applied to mid-term aircraft configurationsto identify earlier opportunities for implementation ofpromising technologies
Summarized, ARTEM addresses the noise generation and the noise reduction for future aircraft configurations and predicts tomorrow’s aircraft noise signature already today – thereby producing knowledge and technologies for more quiet aircrafts of the future.