Measurement techniques for aeroacoustics: from aerodynamic comparisons to aeroacoustic assimilations

Aerodynamic Techniques for Phonetic Fieldwork

This paper discusses the contribution of aerodynamic techniques to record phonetic data in the field. New tools allow using automatic calibrations procedures as well as quantifying data in a reliable way. This permits addressing research questions such as patterns of variations of phenomena. Analytic methods show how to interpret data from physical principles and integrate those in adequate mod...

Aeroacoustics Research in Europe - 1996 Highlights a Summary of Activities in the 6 Ceas-countries

Aeroacoustics, the science of noise generation and propagation through airflows, is a relatively young discipline compared to other more classical fields of mechanics. Nevertheless, it has seen tremendous progress since its foundations were laid in the form of the first overall aeroacoustic theory by Lighthill in his pioneering work in 1952. The basic understanding of aerodynamically generated ...

An introduction to aeroacoustics

Distributed Measurement of Aerodynamic Loads

A method for accurately measuring the drag associated with a protuberance on an aircraft has been devised and implemented in a wind tunnel using a C-130 model. The C-130 aircraft has been heavily modified for various different configurations and the impact that these modifications have had on the aerodynamic performance of the aircraft has not been well documented. This paper describes a method...

Analysis of aerodynamic and aeroacoustic behaviour of a simplified high-speed train bogie

As one of the main aerodynamic noise sources of high-speed trains, the bogie is a complex structure containing many components and the flow around it is extremely dynamic with high-level turbulence. Flow around a simplified bogie at scale 1:10 is studied numerically using Computational Fluid Dynamics (CFD) for comparison with experimental measurements. The upstream inlet flow is represented as ...