The interference on the characteristics of an aerofoil in a wind tunnel of rectangular section

Abstract

Approximate formulae for the interference on an aerofoil in a rectangular wind tunnel have been known and used for several years. More accurate formulae have been developed by Terazawa and Rosenhead, but their results are given in very complicated forms which are unsuitable for numerical computation. In this paper Rosenhead's formulae are reduced to a more convenient form and numerical results are derived for square and Duplex wind tunnels. The correction to the approximate formula is comparatively unimportant for a square tunnel, but important for a Duplex tunnel.