Instability mechanisms in supersonic base flows

R. D. Sandberg; H. F. Fasel

doi:10.2514/6.2004-593

Instability mechanisms in supersonic base flows

R. D. Sandberg, H. F. Fasel

Aerospace and Mechanical Engineering

Research output: Contribution to conference › Paper › peer-review

12 Scopus citations

Abstract

The hydrodynamic stability behavior of the near-wake is investigated using Direct Numerical Simulations (DNS) for a supersonic axisymmetric baseflow at M=2.46. As a consequence of the instability, coherent structures evolve that influence the mean flow behavior. Results are presented for two different Reynolds numbers, Re_D = 30, 000 and Re_D = 60,000. For these investigations, a high-order accurate compressible Navier-Stokes solver in cylindrical coordinates was developed. Simulations with various domain-sizes were performed to investigate the instability behavior to different azimuthal modes.

Original language	English (US)
Pages	5803-5814
Number of pages	12
DOIs	https://doi.org/10.2514/6.2004-593
State	Published - 2004
Event	42nd AIAA Aerospace Sciences Meeting and Exhibit - Reno, NV, United States Duration: Jan 5 2004 → Jan 8 2004

Other

Other	42nd AIAA Aerospace Sciences Meeting and Exhibit
Country/Territory	United States
City	Reno, NV
Period	1/5/04 → 1/8/04

ASJC Scopus subject areas

General Engineering

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10.2514/6.2004-593

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title = "Instability mechanisms in supersonic base flows",

abstract = "The hydrodynamic stability behavior of the near-wake is investigated using Direct Numerical Simulations (DNS) for a supersonic axisymmetric baseflow at M=2.46. As a consequence of the instability, coherent structures evolve that influence the mean flow behavior. Results are presented for two different Reynolds numbers, ReD = 30, 000 and ReD = 60,000. For these investigations, a high-order accurate compressible Navier-Stokes solver in cylindrical coordinates was developed. Simulations with various domain-sizes were performed to investigate the instability behavior to different azimuthal modes.",

author = "Sandberg, \{R. D.\} and Fasel, \{H. F.\}",

year = "2004",

doi = "10.2514/6.2004-593",

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note = "42nd AIAA Aerospace Sciences Meeting and Exhibit ; Conference date: 05-01-2004 Through 08-01-2004",

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T1 - Instability mechanisms in supersonic base flows

AU - Sandberg, R. D.

AU - Fasel, H. F.

PY - 2004

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N2 - The hydrodynamic stability behavior of the near-wake is investigated using Direct Numerical Simulations (DNS) for a supersonic axisymmetric baseflow at M=2.46. As a consequence of the instability, coherent structures evolve that influence the mean flow behavior. Results are presented for two different Reynolds numbers, ReD = 30, 000 and ReD = 60,000. For these investigations, a high-order accurate compressible Navier-Stokes solver in cylindrical coordinates was developed. Simulations with various domain-sizes were performed to investigate the instability behavior to different azimuthal modes.

AB - The hydrodynamic stability behavior of the near-wake is investigated using Direct Numerical Simulations (DNS) for a supersonic axisymmetric baseflow at M=2.46. As a consequence of the instability, coherent structures evolve that influence the mean flow behavior. Results are presented for two different Reynolds numbers, ReD = 30, 000 and ReD = 60,000. For these investigations, a high-order accurate compressible Navier-Stokes solver in cylindrical coordinates was developed. Simulations with various domain-sizes were performed to investigate the instability behavior to different azimuthal modes.

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DO - 10.2514/6.2004-593

M3 - Paper

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T2 - 42nd AIAA Aerospace Sciences Meeting and Exhibit

Y2 - 5 January 2004 through 8 January 2004

ER -

Instability mechanisms in supersonic base flows

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