NACA Technical Notes

Abstract

Report presenting a study of tunnel-induced upwash field for a point element of lift in a rectangular tunnel, which is shown to consist of three superimposed fields that, except for relative position, are independent of the lateral or longitudinal location of the lift element in the tunnel. A contour chart is given of the first field. For tunnels that are not rectangular, the corresponding procedure requires the preparation of a chart for each of several spanwise locations of the lifting element