03.2 - Experimental Aerodynamics
WALL INTERFERENCE CORRECTIONS USING NONLINEAR LEAST-SQUARES OPTIMISATION
S. Noel¹, D.M. Birch², J.J. Doherty², T. Tipnis¹; ¹QinetiQ, United Kingdom ;²University of Surrey, United Kingdom
A novel approach to correcting the effects of wall interference has been developed for closed-wall wind tunnels using a nonlinear least squares optimisation process. The method is shown to apply blockage corrections to bluff bodies in line with the existing two-variable method, and achieves superior drag corrections through an improved representation of upwash interference for lifting bodies.