Wind tunnel experiments have been made to investigate behaviors of laminar separation bubble formed on a NACA 63
1-012 airfoil at chord Reynolds numbers of Re=1.9×10
5–3.8×10
5. Results indicated that a short bubble is formed when the angle of attack α is lower than 10° at
Re=1.9×10
5. The short bubble burst occurs at α=10°. It has been reported that the reattachment point of the short bubble moves upstream as α is increased at higher Reynolds numbers such as at
Re=6×10
6. In this study, however, it is shown that the reattachment point of the short bubble moves downstream as α is increased just before the bubble burst.
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