Studies of Slotted-Wall Interference using an Electrical Analogue Part I.—The Electrical Analogue to Steady and Oscillating Flow in Slotted-Wall TunnelsnPart II.—Particular Examples of Slotted-Wall Tunnel Interference in Steady Flow

摘要

Part I of this report describes a study of the lift interference effect in slotted-wall wind tunnels performed by a pure resistance electrical analogue. Both steady and oscillatory flow are considered. Special tech¬niques devised to represent the singular behaviour of a point wing and at the edges of each slot are dis¬cussed in detail. Comparisons are made with an exact solution based on an equivalent homogeneous boundary condition for steady flow. For oscillatory flow experimental results are presented which show how the magnitude of the interference upwash changes with the frequency of the oscillation.