Numerical Study on Drag Reduction by Micro-Blowing/Suction Compounding Flow Control on Supercritical Airfoil
Micro-Suction technique(MST)is proposed by the development of micro-blowing technique(MBT).Current experiments and numerical studies are mostly focusing on MBT,micro-suction flow control in turbulent boundary layer remains unstudied.Thus,based on 2D-RAE2822 supercritical airfoil,numerical research on MST and MB/ST compounding flow control have been carried out.And Micro-Porous Wall Model(MPWM)is used to represent the real effects that the blowing and suction of the micro-porous wall has on the surface flow.The numerical results of micro-suction indicate that micro-suction control is capable of inducing a lower pressure zone in front of the micro-porous zone,and a higher pressure zone in the rear end.Given that micro-porous zone is placed on the particular section of airfoil,where the pressure drag direction is backward parallel to free-stream direction,the reduction of the pressure induced by micro-suction control can result in the decrease of pressure drag.Finally,combining the previous study on the MBT,a compounding configuration of micro-blowing/suction flow control on RAE2822 airfoil is proposed.The compounding configuration can take the advantage of both micro-blowing and micro-suction,over 20%increase of the lift and up to 15%decrease of the drag can be realized.Therefore,the compounding flowing control of micro-blowing/suction shows a great potential for the flow control on aircraft.
MBST flow control drag control
Cai Junxuan Gao ZhenXun
Beihang University,No.37 Xueyuan Rd. Beijing 100191
国际会议
2014 Asia-Pacific International Symposium on Aerospace Technology(2014亚太航空航天技术学术会议)
上海
英文
1-5
2014-09-24（万方平台首次上网日期，不代表论文的发表时间）