21st Congress of International Council of the Aeronautical Sciences, Melbourne, Australia, 13-18 September, 1998
Paper ICAS-98-3.11.1

COMPUTATION OF WIND TUNNEL FLOWS IN TRANSONIC SLOTTED-WALL TEST SECTIONS

Sedin Y. C. -J., Agrell N.*
Saab AB, Sweden; *FFA, Sweden

Keywords: computation, wind tunnel flows, transonic, slotted-wall, test sections

An investigation of a discrete numerical slot flow model in slotted-wall test sections has been carried out. The background of the slot model is surveyed. Numerical simulations and wind tunnel tests have been performed in two different FFA wind tunnels, the TISOO and the TVMSOO. The same model has been tested and calculated in both tunnels with the similar slots. The effect of closing the side walls in the TVMSOO has been studied. Wall Mach number distributions and integrated forces are compared. The slot flow model works properly. The applicability of the small perturbation equation solved on a Cartesian grid needs further investigations. For complicated flows and high resolution on the test model a more advanced field equation solved on a body conform grid is needed. The same slot flow model could be used.

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