Aero-acoustic source analysis of landing gear noise via dynamic mode decomposition
2014 (English)In: 21st International Congress on Sound and Vibration, ICSV21: / [ed] Malcolm J. Crocker, Marek Pawelczyk, Jing Tian, 2014, Vol. 2, 1245-1252 p.Conference paper (Refereed)
In this paper, we apply dynamic mode decomposition (DMD) on time accurate simulationsof the pressure distribution on a realistic full-scale noselanding gear configuration in order toidentify noise generating structures on landing gear surfaces. The simulated pressure data isobtained from DES simulations using the commercial software STAR-CCM+ by CD-adapco.The dynamics of the surface pressure on a tyre are discussed and the DMD modes are com-puted from instantaneous pressure snapshots. The far-fieldnoise is determined via the FfowcsWilliams-Hawkings analogy, where a given frequency band source term can be reconstructedby choosing an appropriate number of DMD modes.
Place, publisher, year, edition, pages
2014. Vol. 2, 1245-1252 p.
airframe noise, dynamic mode decomposition, landing gear, ffowcs williams hawkings, acoustic analogy
Fluid Mechanics and Acoustics
Research subject Vehicle and Maritime Engineering; Aerospace Engineering
IdentifiersURN: urn:nbn:se:kth:diva-156244ScopusID: 2-s2.0-84922679262ISBN: 978-616-551-682-2OAI: oai:DiVA.org:kth-156244DiVA: diva2:766000
21st International Congress on Sound and Vibration, Beijing, China
FunderEU, FP7, Seventh Framework Programme
QC 20150209. QC 201601152014-11-252014-11-252016-01-15Bibliographically approved