Trailing edge noise production, prediction and control

Abstract

This paper describes the airfoil trailing edge noise generation mechanism and how flow over an airfoil can create tonal or broadband noise. Examples of vortex shedding as well as tonal and broadband noise spectra are presented. A brief review of how trailing edge noise can be be predicted computationally is given and some results shown using a new industrially friendly computational methodology that couples with conventional steady flow simulation software. The paper concludes with a discussion of passive trailing edge noise control devices and their effectiveness