22nd Congress of International Council of the Aeronautical Sciences, Harrogate, UK, 28 August - 1st September, 2000
Paper ICAS 2000-3.7.R2
THE ART AND SCIENCE OF WIND TUNNEL WALL INTERFERENCE : NEW CHALLENGES
M. Mokry, M. Khalid, Y. Mébarki
National Research Council Canada, Canada
Keywords: wind tunnels, subsonic and transonic flow, cfd, psp
Several topics characterizing the current trends
in wall interference research are discussed. The
two-variable method, developed as an
interactive-graphics desktop application, is
demonstrated using the boundary pressure input
from a subsonic wind tunnel. In the treatment of
drag correction, a distinction is made between
the wall-induced gradient effect and the change
of tunnel-stream momentum. Based on a
phenomenological description of transonic flow
and CFD simulations, three different choking
patterns are identified. Finally, PSP
measurements of the boundary conditions of a
transonic test section are discussed. The
comparisons of pressure on the pressure-orifice
tube and the surrounding portions of a
perforated wall are believed to be the first of
their kind reported.
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