Passive Flow Control over an Airfoil by Control Rod at Low Reynolds Number
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Tarih
2020
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Isfahan Univ Technology
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
In the present study, the flow control mechanism of SD7062 airfoil by a rod illustrated using Particle image velocimetry (PIV) technique at pre-stall angles of attack at Reynolds number of Re = 30000. The rod was installed on the suction surface of the airfoil at different chordwise locations. Diameter of the rod was normalized with the chord length of the airfoil and three diameter ratios (d / c = 0.017, 0.033 and 0.044) were examined at angles of attack of alpha = 6 degrees, 8 degrees and 10 degrees. Formation of laminar separation bubble for the baseline airfoil and the effect of rod on the laminar separation bubble were investigated in detail. It is observed that the height of boundary layer was reduced up to 22% by proper rod location and diameter ratio. Moreover, the rod suppressed the unsteady vortices over the suction surface of airfoil significantly. Therefore, the peak magnitudes of turbulent statistics were also decreased up to 30% by the rod.
Açıklama
Anahtar Kelimeler
Airfoil, Control rod, Flow control, Low Reynolds number flow
Kaynak
Journal of Applied Fluid Mechanics
WoS Q Değeri
Q4
Scopus Q Değeri
Q3
Cilt
13
Sayı
6
