Akademik Veri Yönetim Sistemi
11th ANKARA INTERNATIONAL AEROSPACE CONFERENCE, Ankara, Türkiye, 8 - 10 Eylül 2021
In this study, corner design for a closed circuit wind tunnel is investigated. The aim is to obtain a corner design with minimum energy loss and uniform exit velocity profile. Four different turning vanes with different spacings are tested. First turning vane is a 90° bent NACA 0009 profile. The second vane is a controlled diffusion airfoil designed by an inverse method developed by Sanz (VANE A). The third vane is a circular arc airfoil designed by McFarland (VANE B). The fourth vane is a 5 mm thick sheet bent to form a 90° circular arc. The inlet and exit heights of the corner block are 8.44 m each. Inner and outer corners are rounded with a turning radius of 2.4 m. Inlet velocity is 50 m/s. Twelve corner blocks are designed with 4, 5 and 6 vanes using each vane profile. Two dimensional viscous solutions are obtained by using the k- turbulence model. For numerical simulation, 4 m long constant height sections are added before and after the corner block. Similar quality solution meshes are developed for all different corner designs. Results are compared to obtain the most suitable design.