Fast prediction of fan broadband noise with a physics-based aerodynamic model suited for transonic rotor blades.

Abstract

The usual and affordable way to predict broadband noise generated by aero-engine fans relies on empirical correlations established by NASA since the 70's. The present contribution depicts an alternative approach, based on analytical models for the noise sources and their aerodynamic key driving parameters. A simple but physical new loss model suited for slender fan blades improves the rotor wake size prediction and the sensitivity of fan broadband noise to incidence and working line variations.