Supersonic jets, particularly shock-containing jets, often exhibit high-intensity, discrete-
frequency acoustic tones. These tones are the signature of an aeroacoustic resonance loop …

A bibliographical review of the main technologies employed for the mitigation of aircraft
noise is presented. According to a component-based approach, analytical and semi …

8.1 Regular Perturbations 8.1. 1 Webster's horn equation 8.2 Multiple scales......... 8.3
Helmholtz resonator with non-linear dissipation 8.4 Slowly varying ducts......... 8.5 Reflection …

The purpose of this paper is to characterize and model waves that are observed within the
potential core of subsonic jets and relate them to previously observed tones in the near …

Motivated by the problem of jet–flap interaction noise, we study the tonal dynamics that
occurs when an isothermal turbulent jet grazes a sharp edge. We perform hydrodynamic …

There exist a number of good textbooks on both the analytical and the numerical aspects of
PDEs. So why another book on PDEs, then? Well, most existing texts deal with either …

This paper deals with experimental investigation of the lined wall boundary condition in flow
duct applications such as aircraft engine systems or automobile mufflers. A first experiment …

In order to meet noise specifications for future foreseen aircraft propulsion systems, such as
for ultrahigh bypass ratio turbofans and contra-rotating open rotors, the dominant …

COMPUTATIONALLY it is inefficient, and as yet practically impossible, to describe the sound
field that is produced within a turbofan aeroengine duct, by rotor–stator interaction of fan and …

Due to the nonlinearity of the governing equations it is very difficult to predict the sound
production of fluid flows. This sound production occurs typically at high speed flows, for …