Reduction of Wall Interference Effects in the AEDC-PWT 1-FT Transonic Tunnel with Variable Perforated Walls
ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AFB TN
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An experimental investigation was conducted in the 1-ft transonic tunnel to assess the transonic wave cancellation performance of six variable porosity, test section wall designs. The wall interference effects were detected utilizing a 20-deg cone-cylinder static pressure model of 1-percent blockage. The variable wall porosity designs incorporated a sliding cutoff plate with hole geometry identical to a fixed airside plate. Upstream movement of the sliding plates for decreasing porosity provided a test section boundary which successfully eliminated wave reflection wall interference throughout most of the transonic range.
- Test Facilities, Equipment and Methods