A passive leading-edge treatment based on sinusoidal serrations aimed at reducing
turbofan interaction noise has been recently studied in the framework of a European project …

Noise generated by civil transport aircraft during take-off and approach-to-land phases of
operation is an environmental problem. The aircraft noise problem is firstly reviewed in this …

This manual documents the Aircraft NOise Prediction Program 2 (ANOPP2). ANOPP2 is a
toolkit that includes a framework, noise prediction methods, and peripheral software to aid a …

A wideband adaptive multi‐level fast multipole method (MLFMM) is used to accelerate the
matrix–vector products arising from a boundary element method (BEM) formulation which …

Entropy noise corresponds to acoustic fluctuations generated inside gas-turbine engines
when temperature (entropy) spots are accelerated by the mean flow. This type of noise …

Turbulent-flow interactions with the outlet guide vanes are known to mainly contribute to
broadband-noise emission of aeroengines at approach conditions. This paper presents a …

The present article proposes an advanced methodology for numerically simulating complex
noise problems. More precisely, we consider the so-called multi-stage acoustic hybrid …

An experimental study of the azimuthal modes of the sound field generated by a single-
stream round jet installed near a flat plate is presented. The investigation is conducted at …

Entropy noise is produced when temperature fluctuations (entropy spots) are accelerated by
the mean flow, through a nozzle or a turbine stage for instance. When it propagates outside …

THE noise environment around airports is a major cause of concern worldwide, with many
local communities exposed to high levels of aircraft noise; the effective reduction of such a …