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Turboshaft Engine Exhaust Noise Identification

Turboshaft Engine Exhaust Noise Identification

Objective

Helicopters can generate a large amount of external noise, as their traditional missions –rescue, medical, law enforcement– are very close to populated areas. As emphasised in ACARE SRA2, increasing rotorcraft missions in the public vicinity should not lead to increasing public disturbance. Turboshaft engine is known as a major contributor to exterior noise for take-off conditions. ACARE SRA2 objectives imply that noise reduction must be maximised for the most dominant engine noise source in flight. An increased knowledge of the exhaust sound sources balance is then required. Broadband noise at a turboshaft exhaust is assumed to be a mix between combustion and turbine noise. TEENI (Turboshaft Engine Exhaust Noise Identification) will find the relationship between engine modules (combustion chamber, HP Turbine, Power Turbine) and their broadband noise signature and will give a recommendation about the noise source to be reduced in priority. But noise sources breakdown is an ambitious goal, due to the complexity of the physics involved, the harsh environmental conditions, and the small space available. TEENI carries in parallel 4 objectives : 1. To develop sensors for fluctuating quantities, adapted to such an environment 2. To develop noise sources breakdown methods 3. To understand broadband noise generation and propagation through blade rows 4. To discriminate engine exhaust noise sources TEENI’s workplan includes : - Innovative sensors development, - New noise sources breakdown techniques, - Basic studies, including rig experiments, to understand the propagation effects of broadband noise through blade rows. These tests will also help to verify noise breakdown techniques. - New instrumentation and source breakdown techniques will be applied to a full-scale engine test - Development in HELENA (from Friendcopter) of the source breakdown capability - Estimation with HELENA of the engine noise source to be reduced in priority in flight

Coordinator

SAFRAN HELICOPTER ENGINES

Address

Avenue Du President Szydlowski
64510 Bordes

France

Activity type

Other

EU Contribution

€ 456 953

Administrative Contact

Pascale Seyres (Ms.)

Participants (10)

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ANOTEC CONSULTING SL

Spain

EU Contribution

€ 95 560

AVIO SPA

Italy

EU Contribution

€ 94 000

BRUEL & KJAER SOUND & VIBRATION MEASUREMENT A/S

Denmark

EU Contribution

€ 130 350

INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE TURBOMOTOARE - COMOTI

Romania

EU Contribution

€ 500 250

DLR

Germany

EU Contribution

€ 500 994

ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE

Switzerland

EU Contribution

€ 295 432

INASCO HELLAS ETAIREIA EFARMOSMENON AERODIASTIMIKON EPISTIMON EE

Greece

EU Contribution

€ 159 000

MICROFLOWN TECHNOLOGIES BV

Netherlands

EU Contribution

€ 564 000

OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES

France

EU Contribution

€ 198 678

THE PROVOST, FELLOWS, FOUNDATION SCHOLARS & THE OTHER MEMBERS OF BOARD OF THE COLLEGE OF THE HOLY & UNDIVIDED TRINITY OF QUEEN ELIZABETH NEAR DUBLIN

Ireland

EU Contribution

€ 302 201

Project information

Grant agreement ID: 212367

Status

Closed project

  • Start date

    1 April 2008

  • End date

    31 March 2013

Funded under:

FP7-TRANSPORT

  • Overall budget:

    € 4 686 636,88

  • EU contribution

    € 3 297 418

Coordinated by:

SAFRAN HELICOPTER ENGINES

France

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