Linear stability analyses and large eddy simulations for acoustic wave generation mechanism of a transitional supersonic jet

Taku Nonomura, Kozo Fujii

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The flow fluctuation and acoustic waves generated in a transitional supersonic jet are investigated by a linear stability analysis (LSA) and a large-eddy simulation (LES). Using the LSA code developed here and the LES results reported previously, the development of an instability wave and the transition behavior are discussed. As predicted by the LSA code, helical modes are more unstable than axisymmetric modes in LES results. The LES results show that the fluctuation of the helical mode leads to the transition, but sound generation from the transition is much weaker than that from a subsonic transitional jet investigated in the previous studies.

Original languageEnglish
Title of host publicationProceedings of the 5th International Conference on Jets, Wakes and Separated Flows, ICJWSF 2015
EditorsAntonio Segalini
PublisherSpringer Science and Business Media, LLC
Pages407-412
Number of pages6
ISBN (Print)9783319306001
DOIs
Publication statusPublished - 2016 Jan 1
Externally publishedYes
Event5th International Conference on Jets, Wakes and Separated Flows, ICJWSF2015 - Stockholm, Sweden
Duration: 2015 Jun 152015 Jun 18

Publication series

NameSpringer Proceedings in Physics
Volume185
ISSN (Print)0930-8989
ISSN (Electronic)1867-4941

Other

Other5th International Conference on Jets, Wakes and Separated Flows, ICJWSF2015
CountrySweden
CityStockholm
Period15/6/1515/6/18

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Cite this

    Nonomura, T., & Fujii, K. (2016). Linear stability analyses and large eddy simulations for acoustic wave generation mechanism of a transitional supersonic jet. In A. Segalini (Ed.), Proceedings of the 5th International Conference on Jets, Wakes and Separated Flows, ICJWSF 2015 (pp. 407-412). (Springer Proceedings in Physics; Vol. 185). Springer Science and Business Media, LLC. https://doi.org/10.1007/978-3-319-30602-5_51