Laboratory development of low speed wind tunnel for educational purposes

In this paper presents the design and development of wind tunnel for education purposes. The wind tunnel is designed as an open-type, low speed, able to provide wind speeds up to 20 m/s and maximum turbulent intensity is 5%. A 70 cm tube axial fan is driven by a 3 hp motor using a variable frequency drive to allow continuously variable wind speeds. The size of testing chamber is about 40 cm by 40 cm, large enough to conduct experiments such as drag coefficient, airfoil and wing. Preliminary test of air flow in testing chamber shows that wind tunnel is particularly suitable not only for education but also for aerodynamic researches. (paper)