Developing a Robust Wall Interference Correction Methodology for Fixed-Wing Testing at the National Full-Scale Aerodynamics Complex

Abstract

The ability to perform robust and reliable wall interference corrections on wind tunnel data is critical in correlating ground test data obtained in wind tunnel facilities to the conditions an aircraft could anticipate in flight. Performing these corrections is a complicated task and a variety of approaches can be followed with varying results and limitations. The National Full-Scale Aerodynamics Complex is currently working to develop a high-fidelity wall interference correction methodology primarily to support future fixedwing testing. A recent large-scale fixed-wing powered-lift test in both of the National FullScale Aerodynamics Complex’s wind tunnels provided a unique opportunity to gather correlation data and assess the performance of the correction system. The discussion herein gives insight into the initial findings and results of wall correction efforts on this test. It also offers conclusions about the fidelity of the corrections achievable with the current correction methodology, the limitations of the current system, and the potential for expanding and improving the current system in support of future testing.