Pitot Tube-Based Icing Detection: Effect of Ice Blocking on Pressure

Figure 11

Total and static pressure outputs when the pitot tube is at normal temperature and the spray system is open. O–A: the entire air pressure detection system is stationary. A–B: the L-shaped pitot tube is placed into the ice wind tunnel at point A, and the total pressure hole is facing the incoming wind direction. B–C: the spray system is opened at point B to allow the water droplets to hit the pitot tube evenly. C–D: the spray system is closed at point C. After point D, the spray system is reopened.