Aeroacoustical projects (generation 2)

Validation and Improvement of Airframe Noise prediction Tools

The overall noise radiated by modern aircraft has two sources which are quite balanced at approach: the engine and the airframe. The airframe noise (AFN) has a broadband character and is mainly due to the interaction of the turbulent airflow with the high lift devices (slats and flaps) and [more...]

Community Oriented Solutions to Minimise aircraft noise Annoyance

COSMA aims to:

• Improve the understanding of the effects of aircraft noise in the airport community
• Develop techniques for modelling the impact of aircraft noise around airports
• Develop engineering guidelines and methods implementing suitable design and  [more...]

OPtimisation for low Environmental Noise impact

The OPENAIR project focuses on the source noise reduction of both engine- and airframe noise, with the aim to generate solutions that will bring a 2,5 dB improvement towards the ACARE objectives. [more...]

Adaptive and Passive Flow Control for Fan Broadband Noise Reduction

Air traffic is predicted to grow by 5% per year in the short and medium term. Technology advances are required to facilitate this growth without unacceptable levels of noise. FLOCON addresses this requirement by delivering the technology to reduce fan noise at source through the development of innovative concepts based on flow control technologies. [more...]

Turboshaft Engine Exhaust Noise Identification

TEENI deals with experimental identification of the contributions of each of the engine modules to exhaust Broadband Noise emission. This noise component is the second most dominant noise source of a Turboshaft engine, and installing acoustic liners on the exhaust can lead to significant benefit for reducing noise levels from helicopters. [more...]

Integrated approach to novel engine architectures

The DREAM project is the response of the engine community to commercial and environmental pressures that have come about mainly as a result of two main factors:

1. The political pressure to reduce CO2 has increased considerably since the publication of the ACARE goals
2. The increased cost of Jet A-1 fuel throughout the last half of the decade.  [more...]

Environmentally Responsible Air Transport

The ERAT project aims to identify, develop, integrate and validate operational measures that reduce the environmental impact of the air transport operation in the terminal phases of flight.  [more]

VITAL is a European research & technology programme which aims to reduce aircraft engine noise and carbon dioxide (CO₂) emissions.

Read all about it on the VITAL project website:

[http://www.project-vital.org]

New Aircraft Concepts REsearch

Over the past fifty years, the main driver for aircraft design was to improve aircraft operational efficiency, in particular, by reducing fuel consumption. As a result, large commercial transport aircraft have steadily converged to what has become an almost universal configuration. [more ...]

Technologies to IMProve Airframe Noise

TIMPAN’s objective is the community noise reduction for business and large commercial aircraft, inherent to high lift and landing gear components, responsible for about half of the total aircraft noise in approach situation. [more...]

OPTIMAL is an air-ground co-operative project which is aiming to define and validate innovative procedures for the approach and landing phases of aircraft and rotorcraft in a pre-operational environment.

Read all about it on the OPTIMAL project website

[ http://www.optimal.isdefe.es/ ]

Improvement of Fan Broadband Noise Prediction: Experimental investigation and computational modelling

Fan broadband noise is a major aircraft noise challenge now, and in the future it will be even more important. Novel low-noise engine architectures, such as ultra-high-bypass-ratio engines and lower-speed fans, can help address jet noise and fan tone noise. [more...]

Methods for Efficient SimulationS of Aircraft Engine Noise

The MESSIAEN project focuses on the development of the ACTRAN/DGM software product for the simulation of noise generated by turbomachines found in aircraft and, thereafter, on the design of devices effecting a reduction of that critical noise source. [more...]

Turbomachinery noise radiation through the engine exhaust

TURNEX has delivered validated industry-exploitable methods for predicting turbomachinery noise radiation through exhaust nozzles, which will allow EU industry to compete effectively with NASA-funded technology developments in the US. [more...]

Sound Engineering For Aircraft

Several studies related to sound engineering have been performed in a large number of technical areas. SEFA (Sound Engineering For Aircraft) was the first project using these practices to define optimum aircraft community noise shapes (target sounds). [more...]

Computation of Coaxial Jet Noise

Despite the progress in the development of CFD solvers, most of the noise prediction methods currently in use in the aerospace industry are correlations based on empirical databases. These are of very limited practical use for assessing the impact of novel noise reduction techniques on aircraft noise.  [more...]

IMAGINE - developing new calculation methods for railway, road, industrial and aircraft noise.

http://www.imagine-project.org

Jet exhaust aerodynamics and noise

The objectives of JEAN project were to develop and assess methodologies for the prediction of noise generated by high speed subsonic jets including the effects of mixing enhancement and co-axial configurations. The long term aim is to provide design tools for the development of low noise nozzles for HBR engines. [more...]

Research on Silent Aircraft Concepts

 
As  a  complement  to  the on-going research and development  efforts  deployed  by  the Europeanaeronautical  community  towards the reduction of civil aircraft noise, efforts which focus on reducing noise emitted at the source by the engine and the airframe [more...]

Turbomachinery noise source CFD models for low noise aircraft engine designs

In support of the10 dB aircraft noise reduction objective of the Fifth Framework Programme, TurboNoiseCFD has created a new methodology that will improve the design of low noise turbomachinery components.[more...]