LabVIEW software can display up to 16 real-time readings of pressure and velocity over the test object while controlling the angle of attack and fan revolutions per minute. An airfoil stepper motor controller allows for computer control of the airfoil angle of attack from a slide bar on the LabVIEW remote front panel. A separate program calibrates the airfoil angle of attack manual degree reading to the computer slide bar degree reading.
As a result, students can conduct comprehensive experiments remotely. Interactivity includes adjustable test section velocity and airfoil angle attack, real-time updates of data and setpoints, and an audio and video server to enhance realism. With a change of IP address, different airfoils can be selected, such as the National Advisory Committee for Aeronautics NACA 0015 (Symmetrical), NACA 2415 (Trainer), and NACA 4415 (High Lift Amphibious Aircraft). The pressure tappings in the airfoil are connected to pressure transducers to demonstrate lift versus angle of attack relationship and effect of stall on the upper surface airflow.
Figure 4: User client interface for control and display of pressure over airfoil in wind tunnel