With a 4 to 5% annual growth of air traffic in the last years, the reduction of aircraft noise becomes imperative for the social acceptance of air transport growth. This Lecture Series reviews the different sources of aircraft noise, how noise source and propagation can be modelled, reviews solutions to mitigate noise emissions and shed light on the way humans perceive noise.

The first lecture will give and introduction to acoustics and aeroacoustics. On a scientific point of view, there is still much missing knowledge. Therefore, a review of the relevant computational methods will be given covering the fluid dynamics aspects as well as acoustic emission and propagation.

The specificities of the noise sources will then be detailed wether it comes from the airframe, the turbo machinery components of the engine or from the engine exhaust jets. Passive and active noise control strategies will be presented. It is also important to understand the current policy goals in terms of noise footprint reduction, and the relevant international legislation. Tools that are capable of assessing the impact of noise on the community will be presented and the way human beings perceive noise will be addressed.

Finally, an overview of research programmes will be performed, with emphasis on European funded projects.

The Lecture Series Directors are R. Dénos and E. Lecomte from the European Commission, E. Kors from Safran and Prof. C. Schram from the von Karman Institute for Fluid Dynamics.

Timetable

Monday 12 March 2012

• 08:45 Registration
• 09.15 Welcome address
  J. Muylaert, Director, von Karman Institute for Fluid Dynamics, Belgium

Introduction

• 09.30 Introduction to acoustics and aeroacoustics
  C. Schram, von Karman Institute for Fluid Dynamics
• 10:45 Coffee break

Measuring and Modelling Noise

• 11:15 Acoustic beamforming for the ranking of aircraft noise
  P. Sijtsma, NLR, The Netherlands
• 12:30 Lunch break
• 14:00 Acoustic beamforming for the ranking of aircraft noise (Cont’d)
  P. Sijtsma
• 15:15 Coffee break
• 15:45 A review of state-of-the-art aeroacoustic prediction approaches
  R. Ewert, DLR, Germany
• 17:00 Reception

Tuesday 13 March 2012

• 09:00 Advances in turbulence modelling for wall-bounded flows in aeroacoustics
  M. Shur & M. Strelets, NTS, Russia

Airframe and Engine Noise

• 10:45 Airframe noise
  J. Delfs, DLR, Germany
• 12:30 Lunch break
• 14:00 Turbomachinery noise
  M. Roger, ECL, France
• 15:15 Coffee break
• 15:45 Jet noise
  C. Bailly, ECL, France

Wednesday 14 March 2012

• 09:00 Jet noise
  C. Bailly

Noise Mitigation

• 10:30 Coffee break
• 10:45 Efficient and airworthy passive and active airframe noise control strategies
  M. Herr, DLR, Germany
• 12:30 Lunch break

Perceived Noise

• 14:00 Regulatory and policy aspects (LTO Cycle - ICAO - ACARE Goals - Legislation)
  A. Joselzon, EADS Airbus, France
• 15:15 Coffee break
• 15:45 Community noise impact assessment
  I.L.N. Granøien, SINTEF ICT, Norway

Thursday 15 March 2012

• 09:00 Difference between measuring and perceiving aircraft noise: acoustics, phsychoacoustics and others
  F. Márki, Budapest University of Technology and Economics, Hungary
• 10:30 Coffee break

Overview of Noise Research Programmes

• 10:45 Past and ongoing research programmes on aircraft noise
  E. Kors & D.Collin, Snecma Moteurs, France
• 12:30 Lunch break
• 14:00 Visit of the VKI laboratories
• 16:00 Closing