The DREAM (valiDation of Radical Engine Architecture systeMs) project, under the EU FP 7 Transport framework, focuses on novel aeroengine configurations, aiming at:

  • Reducing CO2 emissions by 9% over and above VITAL/EEFAE TRL 4/5 (7% better than ACARE or 27% more than Year 2000 Engine).
  • Reducing noise by 3dB per operation point versus the Year 2000 reference engines at TRL 4, with improved methods, materials and techniques developed on past and existing noise-mitigation programmes.
  • Reducing NOx emissions, accordingly with engine specific fuel burn reduction.

A counter-rotating propeller noise model was developed for the project, based on a Nonlinear Helmholtz Equation (NLH) approach and parametric study.