Local and global stability analysis on flows around a SD7003 airfoil

Shiwei Qin; Mei Zhuang; Miguel R. Visbal; Marshall C. Galbraith; Yongsheng Lian; Wei Shyy

doi:10.2514/6.2009-1470

Local and global stability analysis on flows around a SD7003 airfoil

Shiwei Qin^*, Mei Zhuang, Miguel R. Visbal, Marshall C. Galbraith, Yongsheng Lian, Wei Shyy

^*Corresponding author for this work

Research output: Chapter in Book/Conference Proceeding/Report › Conference Paper published in a book › peer-review

5 Citations (Scopus)

Abstract

Laminar separation and subsequent transition to turbulent flow plays an important role in the performance of airfoils operating at low Reynolds number (Re<10⁵). For better understanding of the formation and turbulent breakdown of laminar separation bubbles (LSB), both local and two-dimensional global linear stability analysis are applied to investigate the stability of a CFD time-averaged non-parallel flowfield over a SD7003 airfoil at Reynolds number 6×10⁴. The flow is found to be unstable at all wavenumbers examined. The most unstable modes from local and global stability analysis are close to each other, and the frequency of this mode is in agreement with CFD results. Spatial structures of the disturbances at most unstable modes are discussed. By applying the stability analysis, the temporal flow structures of the LSB can be examined with the most unstable modes of global stability results.

Original language	English
Title of host publication	47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition
DOIs	https://doi.org/10.2514/6.2009-1470
Publication status	Published - 2009
Externally published	Yes
Event	47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition - Orlando, FL, United States Duration: 5 Jan 2009 → 8 Jan 2009

Publication series

Name	47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition

Conference

Conference	47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition
Country/Territory	United States
City	Orlando, FL
Period	5/01/09 → 8/01/09

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10.2514/6.2009-1470

Cite this

Qin, S., Zhuang, M., Visbal, M. R., Galbraith, M. C., Lian, Y., & Shyy, W. (2009). Local and global stability analysis on flows around a SD7003 airfoil. In 47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition Article 2009-1470 (47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition). https://doi.org/10.2514/6.2009-1470

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title = "Local and global stability analysis on flows around a SD7003 airfoil",

abstract = "Laminar separation and subsequent transition to turbulent flow plays an important role in the performance of airfoils operating at low Reynolds number (Re<105). For better understanding of the formation and turbulent breakdown of laminar separation bubbles (LSB), both local and two-dimensional global linear stability analysis are applied to investigate the stability of a CFD time-averaged non-parallel flowfield over a SD7003 airfoil at Reynolds number 6×104. The flow is found to be unstable at all wavenumbers examined. The most unstable modes from local and global stability analysis are close to each other, and the frequency of this mode is in agreement with CFD results. Spatial structures of the disturbances at most unstable modes are discussed. By applying the stability analysis, the temporal flow structures of the LSB can be examined with the most unstable modes of global stability results.",

author = "Shiwei Qin and Mei Zhuang and Visbal, \{Miguel R.\} and Galbraith, \{Marshall C.\} and Yongsheng Lian and Wei Shyy",

year = "2009",

doi = "10.2514/6.2009-1470",

language = "English",

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series = "47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition",

booktitle = "47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition",

note = "47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition ; Conference date: 05-01-2009 Through 08-01-2009",

}

Qin, S, Zhuang, M, Visbal, MR, Galbraith, MC, Lian, Y & Shyy, W 2009, Local and global stability analysis on flows around a SD7003 airfoil. in 47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition., 2009-1470, 47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, 47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, Orlando, FL, United States, 5/01/09. https://doi.org/10.2514/6.2009-1470

Local and global stability analysis on flows around a SD7003 airfoil. / Qin, Shiwei; Zhuang, Mei; Visbal, Miguel R. et al.
47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition. 2009. 2009-1470 (47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition).

Research output: Chapter in Book/Conference Proceeding/Report › Conference Paper published in a book › peer-review

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T1 - Local and global stability analysis on flows around a SD7003 airfoil

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AU - Visbal, Miguel R.

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AU - Lian, Yongsheng

AU - Shyy, Wei

PY - 2009

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N2 - Laminar separation and subsequent transition to turbulent flow plays an important role in the performance of airfoils operating at low Reynolds number (Re<105). For better understanding of the formation and turbulent breakdown of laminar separation bubbles (LSB), both local and two-dimensional global linear stability analysis are applied to investigate the stability of a CFD time-averaged non-parallel flowfield over a SD7003 airfoil at Reynolds number 6×104. The flow is found to be unstable at all wavenumbers examined. The most unstable modes from local and global stability analysis are close to each other, and the frequency of this mode is in agreement with CFD results. Spatial structures of the disturbances at most unstable modes are discussed. By applying the stability analysis, the temporal flow structures of the LSB can be examined with the most unstable modes of global stability results.

AB - Laminar separation and subsequent transition to turbulent flow plays an important role in the performance of airfoils operating at low Reynolds number (Re<105). For better understanding of the formation and turbulent breakdown of laminar separation bubbles (LSB), both local and two-dimensional global linear stability analysis are applied to investigate the stability of a CFD time-averaged non-parallel flowfield over a SD7003 airfoil at Reynolds number 6×104. The flow is found to be unstable at all wavenumbers examined. The most unstable modes from local and global stability analysis are close to each other, and the frequency of this mode is in agreement with CFD results. Spatial structures of the disturbances at most unstable modes are discussed. By applying the stability analysis, the temporal flow structures of the LSB can be examined with the most unstable modes of global stability results.

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ER -

Local and global stability analysis on flows around a SD7003 airfoil

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