Airfoil Stall Suppression by Use of a Bubble Burst Control Plate

To suppress the stall on an NACA 0012 airfoil, a thin plate (hereafter referred to as a burst control plate) was attached on the airfoil to delay the burst of laminar separation bubbles formed at the stall angle. The burst control plate is used to enhance the vortical structures in the separated she...

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Bibliographic Details
Published in:AIAA journal 2009-02, Vol.47 (2), p.322-330
Main Authors: Rinoie, Kenichi, Okuno, Masafumi, Sunada, Yasuto
Format: Article
Language:English
Subjects:
Aerodynamics
Applied fluid mechanics
Exact sciences and technology
Flow control
Fluid dynamics
Fundamental areas of phenomenology (including applications)
Instrumentation for fluid dynamics
Physics
Reynolds number
Wind tunnels
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Summary:To suppress the stall on an NACA 0012 airfoil, a thin plate (hereafter referred to as a burst control plate) was attached on the airfoil to delay the burst of laminar separation bubbles formed at the stall angle. The burst control plate is used to enhance the vortical structures in the separated shear layer. Wind-tunnel tests were conducted at a chord Reynolds number of 1:3 x 10... Flow visualization tests and surface pressure measurements showed that the burst control plate placed on the airfoil suppresses the bubble burst at a wide range of angle of attack and therefore, both the stall angle and the maximum lift coefficient are increased. The particle image velocimetry measurements indicated that when the angle of attack of the airfoil with the burst control plate is set higher than the stall angle of the original airfoil, a similar flow structure of the original airfoil was observed. (ProQuest: ... denotes formulae/symbols omitted.)
ISSN:0001-1452
1533-385X
DOI:10.2514/1.37352