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

Taku Nonomura; Kozo Fujii

doi:10.1007/978-3-319-30602-5_51

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

Research output: Chapter in Book/Report/Conference proceeding › Conference 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 language	English
Title of host publication	Proceedings of the 5th International Conference on Jets, Wakes and Separated Flows, ICJWSF 2015
Editors	Antonio Segalini
Publisher	Springer Science and Business Media, LLC
Pages	407-412
Number of pages	6
ISBN (Print)	9783319306001
DOIs	https://doi.org/10.1007/978-3-319-30602-5_51
Publication status	Published - 2016 Jan 1
Externally published	Yes
Event	5th International Conference on Jets, Wakes and Separated Flows, ICJWSF2015 - Stockholm, Sweden Duration: 2015 Jun 15 → 2015 Jun 18

Publication series

Name	Springer Proceedings in Physics
Volume	185
ISSN (Print)	0930-8989
ISSN (Electronic)	1867-4941

Other

Other	5th International Conference on Jets, Wakes and Separated Flows, ICJWSF2015
Country/Territory	Sweden
City	Stockholm
Period	15/6/15 → 15/6/18

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1007/978-3-319-30602-5_51

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

Linear stability analyses and large eddy simulations for acoustic wave generation mechanism of a transitional supersonic jet. / Nonomura, Taku; Fujii, Kozo.

Proceedings of the 5th International Conference on Jets, Wakes and Separated Flows, ICJWSF 2015. ed. / Antonio Segalini. Springer Science and Business Media, LLC, 2016. p. 407-412 (Springer Proceedings in Physics; Vol. 185).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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. Springer Proceedings in Physics, vol. 185, Springer Science and Business Media, LLC, pp. 407-412, 5th International Conference on Jets, Wakes and Separated Flows, ICJWSF2015, Stockholm, Sweden, 15/6/15. https://doi.org/10.1007/978-3-319-30602-5_51

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

Nonomura, Taku ; Fujii, Kozo. / Linear stability analyses and large eddy simulations for acoustic wave generation mechanism of a transitional supersonic jet. Proceedings of the 5th International Conference on Jets, Wakes and Separated Flows, ICJWSF 2015. editor / Antonio Segalini. Springer Science and Business Media, LLC, 2016. pp. 407-412 (Springer Proceedings in Physics).

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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.",

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AB - 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.

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

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