THEORETICAL AND EXPERIMENTAL INVESTIGATIONS OF WALL ADAPTATION CONTROL IN WIND-TUNNEL AND HYBRID WIND-TUNNEL TESTING

The hybrid wind tunnel principle is an economical alternative to classical wind tunnels. Wall adaptation tests are reported which are performed in a small scale arrangement duplicating original kinematic relations. A new method for controlling the quality of wall adaptation is presented which is based on the pressure distribution at the rigid wall. This procedure may also be applied for wall adaptation in conventional wind tunnel technique.