Abstract
The mixed difference method (ref. [1]) is used to investigate the convergence problem of the three-dimensional transonic self-correcting wind tunnel. The interior wind tunnel and the exterior unconfined flow-fields are described by the transonic small disturbance equation. In order to determine whether the unconfined-flow is obtained in the interior tunnel, two flow variables at a control surface are needed. They are the perturbation velocity components parallel to the free stream and perpendicular to the control surface. Their distributions are evaluated at the control surface for both the interior and exterior regions. The results of the numerical calculations indicate that after several iterations of one flow variable at the control surface the interior wind tunnel flowfield converges to the free-air flowfield.
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