Direct numerical simulations of transitional supersonic base flows

Richard D. Sandberg; Hermann Fasel

doi:10.2514/6.2005-98

Direct numerical simulations of transitional supersonic base flows

Richard D. Sandberg, Hermann Fasel

Aerospace and Mechanical Engineering

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

11 Scopus citations

Abstract

Investigations of transitional supersonic base flows at M = 2.46 using Direct Numerical Simulations (DNS) are discussed. As a consequence of flow instabilities, coherent structures evolve that have a profound impact on the global flow behavior. Simulations with various circumferential domain sizes are performed to investigate the effect of coherent structures associated with different azimuthal modes on the mean flow. It is shown that the mean base pressure increases when the most dominant modes are deliberately eliminated. Results are presented for Reynolds numbers between 30,000 and 100,000. The results obtained from the DNS at Re_D = 100,000 are compared to experiments at Re_D = 3,300,000. For these investigations, a high-order accurate compressible Navier-Stokes solver in cylindrical coordinates was developed.

Original language	English (US)
Pages	9569-9580
Number of pages	12
DOIs	https://doi.org/10.2514/6.2005-98
State	Published - 2005
Event	43rd AIAA Aerospace Sciences Meeting and Exhibit - Reno, NV, United States Duration: Jan 10 2005 → Jan 13 2005

Other

Other	43rd AIAA Aerospace Sciences Meeting and Exhibit
Country/Territory	United States
City	Reno, NV
Period	1/10/05 → 1/13/05

ASJC Scopus subject areas

General Engineering

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10.2514/6.2005-98

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title = "Direct numerical simulations of transitional supersonic base flows",

abstract = "Investigations of transitional supersonic base flows at M = 2.46 using Direct Numerical Simulations (DNS) are discussed. As a consequence of flow instabilities, coherent structures evolve that have a profound impact on the global flow behavior. Simulations with various circumferential domain sizes are performed to investigate the effect of coherent structures associated with different azimuthal modes on the mean flow. It is shown that the mean base pressure increases when the most dominant modes are deliberately eliminated. Results are presented for Reynolds numbers between 30,000 and 100,000. The results obtained from the DNS at ReD = 100,000 are compared to experiments at ReD = 3,300,000. For these investigations, a high-order accurate compressible Navier-Stokes solver in cylindrical coordinates was developed.",

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pages = "9569--9580",

note = "43rd AIAA Aerospace Sciences Meeting and Exhibit ; Conference date: 10-01-2005 Through 13-01-2005",

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T1 - Direct numerical simulations of transitional supersonic base flows

AU - Sandberg, Richard D.

AU - Fasel, Hermann

PY - 2005

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N2 - Investigations of transitional supersonic base flows at M = 2.46 using Direct Numerical Simulations (DNS) are discussed. As a consequence of flow instabilities, coherent structures evolve that have a profound impact on the global flow behavior. Simulations with various circumferential domain sizes are performed to investigate the effect of coherent structures associated with different azimuthal modes on the mean flow. It is shown that the mean base pressure increases when the most dominant modes are deliberately eliminated. Results are presented for Reynolds numbers between 30,000 and 100,000. The results obtained from the DNS at ReD = 100,000 are compared to experiments at ReD = 3,300,000. For these investigations, a high-order accurate compressible Navier-Stokes solver in cylindrical coordinates was developed.

AB - Investigations of transitional supersonic base flows at M = 2.46 using Direct Numerical Simulations (DNS) are discussed. As a consequence of flow instabilities, coherent structures evolve that have a profound impact on the global flow behavior. Simulations with various circumferential domain sizes are performed to investigate the effect of coherent structures associated with different azimuthal modes on the mean flow. It is shown that the mean base pressure increases when the most dominant modes are deliberately eliminated. Results are presented for Reynolds numbers between 30,000 and 100,000. The results obtained from the DNS at ReD = 100,000 are compared to experiments at ReD = 3,300,000. For these investigations, a high-order accurate compressible Navier-Stokes solver in cylindrical coordinates was developed.

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DO - 10.2514/6.2005-98

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T2 - 43rd AIAA Aerospace Sciences Meeting and Exhibit

Y2 - 10 January 2005 through 13 January 2005

ER -

Direct numerical simulations of transitional supersonic base flows

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