Noise reduction breakthroughs for new ultraefficient aircraft

Forthcoming EU call topic HORIZON-CL5-2027-04-Two-Stage-D5-09 · HORIZON Research and Innovation Actions. Part of call HORIZON-CL5-2027-04-Two-Stage: BATTERIES and MOBILITY. Opens 2026-12-15; next deadline 2027-04-14 (first stage). Topic page: https://ec.europa.eu/info/funding-tenders/opportunities/portal/screen/opportunities/topic-details/HORIZON-CL5-2027-04-Two-Stage-D5-09

Expected Outcome: Project results are expected to contribute to all of the following expected outcomes: - Airframe / cabin noise for new aircraft design; - Engine noise sources and installation effects; - Noise perception/annoyance and mitigation methodologies.

Scope: The topic aims to deliver advanced and validated numerical and experimental aero-acoustic methodologies for the noise prediction of new ultraefficient aircraft designs, primarily for large passenger aircraft with new open fan engine architectures and ultra-high by-pass ratio architectures. The topic should reinforce fundamental understanding, fill gaps and propose new/updated technologies towards enabling open fan designs and techno bricks for significantly reduced cabin noise. Mayor emphasis is expected to be put to existing/new experimental data and procedures, multi-disciplinary design and optimisation, aerodynamics, aeroacoustics and noise reduction integrated metamaterials/structures. In addition, the proposals may also provide even better noise footprint assessments and better annoyance understanding and mitigation methodologies. The topic should build upon lessons learnt and gaps identified from H2020.CS2-LPA-01-D01 as well as complementing the projects resulted from HORIZON-CL5-2022-D5-01-12.