ACOCTIA · Active Control Of Cavity Tones In Aircrafts
FP7 — People (Marie Curie Actions)
- Duration
- 2013-11-01 → 2016-01-09
- EU contribution
- €168,896
- Participants
- 1
- Scheme
- MC-IEF
Lines connect the coordinator with its partners.
Results in brief
Active Control Of Cavity Tones In Aircrafts
Airframe noise is equal to or louder than engine noise during the landing approach of a commercial aircraft. With the growth of air traffic as well as the ever-increasing level of urbanisation around most airports in Europe, the annoyance near airports is increasing, and the environmental concerns and noise certification regulations make the study of airframe noise an important research topic. The European Commission, within the Advisory Council for Aeronautics Research in Europe (ACARE) has set an ambitious environmental objective; a noise reduction target for the air traffic noise of 10 dB reduction per aircraft operation as the first 2020 goal (CALM 2007). The main objective of the EU FP7 IEF ACOCTIA focuses on the source noise reduction of airframe noise due to the landing gear cavities; specifically, the cavity tones produced as a result of a fluid-dynamic or fluid-resonant oscillation by controlling cavity flow oscillations, with the aim to generate solutions that will bring improvement towards the ACARE objectives. The following specific technical and scientific objectives are defined in the ACOCTIA project: • Design considerations of the cavity to ensure that any resonant coupling between the cavity frequencies and the fluid-dynamic and fluid-resonant oscillations are minimised (this objective could also be seen as a passive control approach). • Integration of hybrid concepts; active/passive control of the cavity tones of aircraft: investigation of a range of technologies aimed at ensuring local control of the cavity tonal noise generation by means of passive control, active noise control, flow control as well as adaptive and variable techniques. • Experimental validation in the Anechoic Chamber. More information about the project can be found at the project website http://www.acoctia.eu/ Dr. Pedro Cobo Parra - AGENCIA ESTATAL CONSEJO SUPERIOR DE INVESTIGACIONES CIENTIFICAS pedro.cobo@csic.es Dr. Cristobal Gonzalez Diaz - IEF Researcher cristobal.g.diaz@csic.es Instituto de Tecnologías Físicas y de la Información (ITEFI) Consejo Superior de Investigaciones Científicas (CSIC) Serrano, 144 28006 Madrid Spain
Data: CORDIS, © European Union
Project objective
Airframe noise is equal to or louder than engine noise during the landing approach of a commercial aircraft. With the growth of air traffic as well as the ever increasing level of urbanisation around most airports in Europe, the annoyance near airports is increasing, and the environmental concerns and noise certification regulations make the study of airframe noise an important research topic. The European Commission, within the Advisory Council for Aeronautics Research in Europe (ACARE) has set an ambitious environmental objective; a noise reduction target for the air traffic noise of 10 dB reduction per aircraft operation as the first 2020 goal (CALM 2007).Cavity noise is one of the most important airframe noises. When flow passes over a cavity or opening, due to vortex shedding at the upstream edge of the cavity, intensive tone noises may be generated. The tone noise generated in this way could be categorized as fluid-dynamic oscillation noise. However, at low flow speed depending on the geometry of the cavity, another type of tone noise due to fluid resonant oscillation within the cavity may occur.The objective of the proposed IEF project focuses on the source noise reduction of airframe noise due to the landing gear cavities; specifically the cavity tones produced as a result of a fluid-dynamic or fluid-resonant oscillation, with the aim to generate solutions that will bring improvement towards the ACARE objectives. The goal will be achieved by consolidating and linking the state-of-art in the field and by implementing hybrid passive/active strategies.
Original text from CORDIS.
Participants
- AGENCIA ESTATAL CONSEJO SUPERIOR DE INVESTIGACIONES CIENTIFICAS · MadridCoordinatorSpain
Links
Data: CORDIS, © European Union