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CORE NOISE ENGINE TECHNOLOGY

Objective

Lean burn combustor technologies introduced to reduce NOx emissions are proving to be inherently noisier than conventional combustors, generating broadband noise that can be heard external to the aircraft. Without careful design and optimisation, there is a danger the low emission cores will cause the aircraft engines to exceed the Horizon 2020 noise requirement.

The research in the CORNET proposal is aimed at understanding the flow physics involved in the generation and propagation of core noise in low emission cores. It includes both the ‘direct noise’ of combustion, pressure waves generated directly by unsteadiness in the rate of combustion, and the ‘indirect noise’ generated as entropy waves accelerate through the Nozzle Guide Vanes (NGVs) at combustor exit and propagate through turbine blade rows.

Large Eddy Simulations of a combustor with a realistic engine fuel injector operating at representative engine conditions are validated through high-speed optical diagnostics applied to a high-pressure rig. The combustor modelling gives the entropy and acoustic waves incident on the NGVs. The generation of in-direct noise is predicted through unsteady high-resolution computations of the interaction of these entropy and acoustic waves within a high-pressure turbine stage. The new understanding will be captured in an advanced analytical combustion noise prediction tool that can be readily used by industry.

Coordinator

THE CHANCELLOR MASTERS AND SCHOLARS OF THE UNIVERSITY OF CAMBRIDGE
Net EU contribution
€ 519 988,75
Address
Trinity Lane The Old Schools
CB2 1TN Cambridge
United Kingdom

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Region
East of England East Anglia Cambridgeshire CC
Activity type
Higher or Secondary Education Establishments
Other funding
€ 519 988,75

Participants (2)

DEUTSCHES ZENTRUM FUR LUFT - UND RAUMFAHRT EV
Germany
Net EU contribution
€ 377 783,50
Address
Linder Hohe
51147 Koln

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Region
Nordrhein-Westfalen Köln Köln, Kreisfreie Stadt
Activity type
Research Organisations
Other funding
€ 377 783,50
TECHNISCHE UNIVERSITAT DARMSTADT
Germany
Net EU contribution
€ 100 000,00
Address
Karolinenplatz 5
64289 Darmstadt

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Region
Darmstadt Darmstadt, Kreisfreie Stadt
Activity type
Higher or Secondary Education Establishments
Other funding
€ 100 000,00