Investigations of Wind Tunnel Wall Correction Methods for Airfoil Low-speed Dynamic Pressure Measurement

Abstract

When the airfoil is subjected to unsteady wind tunnel test, it is necessary to correct the wall interference to obtain accurate aerodynamic data from test.Using a group of NACA 0012 airfoil models with same geometric similarities and different sizes, airfoil low-speed dynamic pressure measurement is carried out in NF-3 wind tunnel of Northwestern Polytechnical University.Different scale model test results are interpolated to 0 scale under the same dimensionless dynamic parameters to calculate the wall interference.The wind tunnel test results are used to evaluate and correct the wall interference of dynamic test.The results show that the proposed correction method is effective, and this method can provide references and ideas for wall interference correction.

Keywords

• naca 0012 airfoil
• dynamic pressure measurement
• reduced frequency
• linear interpolation
• wall interference correction