An Extended Local Scattering Theory for Acoustic-radiation and Receptivity of Trailing-edge Flows

Projektinformationen

STAR

ID Finanzhilfevereinbarung: 659328

DOI 10.3030/659328

Abgeschlossenes Projekt

EK-Unterschriftsdatum 12 März 2015

Startdatum 31 Januar 2016

Enddatum 30 Januar 2018

Finanziert unter

• EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions

Gesamtkosten € 195 454,80

EU-Beitrag € 195 454,80

Koordiniert durch

IMPERIAL COLLEGE OF SCIENCE TECHNOLOGY AND MEDICINE
United Kingdom

Ziel

Trailing-edge flows arise in many technological applications, such as aircraft wings in aeronautics and mixing devices in chemical engineering. Two important and fundamental processes take place near the trailing edge, namely the acoustic radiation and receptivity, which refer to generation of sound by fluctuations within the flows and excitations of instability waves by ambient disturbances, respectively. This project will investigate (a) generation of instability waves in the wake as free-stream acoustic and vortical disturbances impinge on the trailing edge; (b) radiation of sound when Tollmien-Schlichting (T-S) waves in the upstream boundary layer propagate through and interact with the trailing-edge flow. Both processes will be analysed mathematically by developing a Local Scattering Theory, which we recently proposed as an appropriate framework for describing the coupling of distinct characteristic motions in a region of strong inhomogenuity. Furthermore, with radiation and receptivity being described properly, we will move on to investigate the so-called acoustic feedback loops, in which instability waves and acoustic waves are generated from each other, leading to self-sustained oscillations. First-principle theories will be developed to predict the intensities as well as the tones (frequencies) of the oscillations. As receptivity, acoustic radiation and acoustic feedback loops are fundamental processes closely related to drag on the wing, jet and airframe noise and mixing of reactants, the present project is of high practical relevance. From the methodology point of view, this project will combine sophisticated asymptotic methods with highly accurate numerical computations, enabling us to tackle a greater range of complex problems, for which numerical or analytical method alone would be inadequate.

Wissenschaftliches Gebiet

• engineering and technology › mechanical engineering › vehicle engineering › aerospace engineering › aircraft
• natural sciences › physical sciences › classical mechanics › fluid mechanics › fluid dynamics
• natural sciences › physical sciences › acoustics
• engineering and technology › mechanical engineering › vehicle engineering › aerospace engineering › aeronautical engineering
• engineering and technology › chemical engineering

Programm/Programme

• H2020-EU.1.3. - EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions Main Programme
• H2020-EU.1.3.2. - Nurturing excellence by means of cross-border and cross-sector mobility

Thema/Themen

• MSCA-IF-2014-EF - Marie Skłodowska-Curie Individual Fellowships (IF-EF)

Aufforderung zur Vorschlagseinreichung

H2020-MSCA-IF-2014

Finanzierungsplan

MSCA-IF-EF-ST - Standard EF

Koordinator

IMPERIAL COLLEGE OF SCIENCE TECHNOLOGY AND MEDICINE

• Netto-EU-Beitrag: € 195 454,80
• Adresse: SOUTH KENSINGTON CAMPUS EXHIBITION ROAD ; SW7 2AZ LONDON ; Vereinigtes Königreich
• Region: London › Inner London — West › Westminster
• Aktivitätstyp: Higher or Secondary Education Establishments
• Gesamtkosten: € 195 454,80