Analyzing the Impact of the Inlet Temperature on the Acoustic Noise Production from a Supersonic Jet using LES
2013 (English)In: Proceedings of Meetings on Acoustics / [ed] Acoustical Society of America, American Institute of Physics (AIP), 2013, 030011- p.Conference paper (Refereed)
Non-ideal expanded supersonic jets emerging from a nozzle produce three different types of noise, i.e., shock-associated broadband noise,screech noise, and the turbulent mixing noise. The screech tone occurs due to self-excitation in a feedback-loop of flow propagating downstream and acoustic wave interaction. In downscaled laboratory experiments often the screech noise occurs, while the real applied exhaustjet of a gas turbine engine does not show this phenomena. Apart from a geometric scaling difference, usually a lower temperature is employed in experimental studies. The compressible Navier-Stokes equations are simulated numerically by a large eddy simulation approach to investigate the effect of jet operation temperature onto the noise development in a supersonic jet originating from a convergent-divergent nozzle. The jet-exit Mach-number is 1.56, while the total temperature ratios are 1.27, 2.46, and 3.65. The differences in the acoustic near-field will be presented and the interaction of flow-field with acoustic waves will be analyzed and compared to each other.
Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2013. 030011- p.
, Proceedings of Meetings on Acoustics, ISSN 1939800X ; Vol. 19
Supersonic Jet, temperature effects, LES, acoustics
IdentifiersURN: urn:nbn:se:kth:diva-124157DOI: 10.1121/1.4799241ScopusID: 2-s2.0-84878961768OAI: oai:DiVA.org:kth-124157DiVA: diva2:633228
21st International Congress on Acoustics, ICA 2013 - 165th Meeting of the Acoustical Society of America; Montreal, QC, Canada, 2-7 June, 2013
QC 201406182013-06-262013-06-262014-09-25Bibliographically approved