The purpose of this study is to investigate the effects of leading-edge laminar separation bubble on trailing-edge separation.
The wall static pressure distributions with and without leading-edge laminar separation bubble were measured on the upper and lower surfaces of the wing.
The measurements were carried out for the conditions of three Reynolds numbers and various angles of attack with and without leading-edge laminar separation bubble.
At low Reynolds number (≤ 1.0 x $10^6$), leading-edge stall is caused by the bursting of the short bubble. But, at high Reynolds number (=1.5 x $10^6$), it is caused by the leading-edge turbulent separation.
At low Reynolds number (≤ 1.0 x $10^6$), trailing-edge separation point with leading-edge laminar separation bubble moves upstream compared to the one without leading-edge laminar separation bubble. But, at high Reynolds number (=1.5 x $10^6$), it moves downstream compared to the one without leading-edge laminar separation bubble.
