Output details

Application of frequency-domain linearized Euler solutions to the prediction of aft fan tones and comparison with experimental measurements on model scale turbofan exhaust nozzles

Significance of output:

Industry requires improved noise prediction methods to reduce the risk of failing engine noise certification. Linearised Euler equation (LEE) solvers have been developed recently to predict aft fan noise but none had been validated with experimental data. This paper provided industry with the evidence (using EU funds plus over £ 500,000 of industrial investment) by validating those predictions against experimental data specifically showing that the level and directivity of a range of acoustic modes is well predicted. This has given the industrial partners, including Rolls-Royce and Airbus, the confidence that flow/acoustic interaction effects are adequately modelled with LEE solutions.