The discussion centers on creating a wind tunnel for testing airfoil lift at varying angles of attack and air velocities. The primary challenge is achieving more than three speeds, as most available fans are limited to this range. A solution proposed is to utilize a PWM (Pulse Width Modulation) drive on a DC electric motor to create a continuously-variable speed fan. Participants also inquire about the types of fans available and the possibility of custom fan construction.
PREREQUISITESAerospace engineers, electrical engineers, students conducting experiments in fluid dynamics, and hobbyists building wind tunnels for aerodynamic testing.
Airfoil_111 said:I am making a wind tunnel to test the lift of an airfoil when chaning the variables of angle of attack and air velocity. For a good EEI I need more then 3 speeds. However, all the people I know only have 3 speed fans, I don't know how to get more speeds as the wind tunnel gets built around the fan. Any ideas??