Improving further high-lift configuration of an airplane model through inboard slat and strake experiments

The introduction of the full paper discusses recent relevant developments and then proposes the experimental research mentioned in the title, which we believe has shown good promise for further improving high-lift configurations and is fully explained in sections 1 and 2. Their core consists of: (1) we did inboard slat and strake experiments on the high-lift configuration of an airplane model in the 4 m×3 m low-speed wind tunnel to analyze its aerodynamic performance; (2) we analyze the effects of different length settings of an inboard slat on the lift coefficient of the high-lift configuration and compare the aerodynamic performances of a nacelle strake during take-off and landing operiations respectively. The experimental results, given in Figs. 4, 5 and 6, and their analysis show preliminarily that: (1) linear lift coefficients of the high-lift configuration does not increase with increasing length of the inboard slat; (2) the lift coefficients in stall region and C _{L max} increase with increasing length of the inboard slat; (3) with the nacelle strake installation, the maximum useable lift, C _{L max} and the stall angle of attack increase significantly the lift-to-drag ratio and the pitching moment coefficient improve remarkably, while the aerodynamic performance of the linear section shows a little change.