Abstract: In this paper a method is outlined to compute wall-interference in closed low speed wind tunnel for 3D high lift test using wall pressure at optimum points and the influence func-tion (WPIF method for short).The experimental results of a high lift model in small wind tun-nel are corrected by applying the WPIF method. The corrected results are compared with the wall interference-free data bf this high lift model in large wind tunnel. It is shown that the WPIF method is desirable for the correction of lift,drag and pitch moment.

Key words: wall interference, high lift, low speed.pressure measurement