21st Congress of International Council of the Aeronautical Sciences, Melbourne, Australia, 13-18 September, 1998
Paper ICAS-98-R.3.11

THREE DIMENSIONAL FLOW SIMULATION IN THE TEST SECTION OF A SLOTTED TRANSONIC WIND TUNNEL

Vieira R., Azevedo J. L. F.*, Fico G. C. R.**, Basso E.**
UNESP/FEG, Brasil; *CTA/IAE/ ASE-N, Brasil; **CTA/ITA/IEAA, Brasil

Keywords: three dimensional flow simulation, test section, slotted transonic wind tunnel

The paper presents flow simulations relevant to transonic wind tunnel design and operation. A three-dimensional, finite difference, computational code which solves the. Euler equations in a general, body conforming (curvilinear grid has been developed and used for these simulations). This code incorporates the capability of including test section wall slots for realistic simulation of a transonic wind tunnel facility. Test cases considered include a tunnel contraction alone and a complete high speed tunnel segment. Both cases with closed and open slots were considered. The results obtained adequately reproduced the expected flow features for the conditions analyzed and indicated that the particular configuration studied holds promise of providing very good test section flow quality.

view full paper