How is the flow of the Pitot tube measured?

The

pitch flow is measured on the basis of air pressure into it and at the established air density of the atmosphere at its specific height and air temperature. These equations are based on Bernoullim principles at moderate speeds that must be below the supersonic range. Other factors such as ice accommodation or cross winds may also affect the accuracy of the Pitot tube. Although the Pitot tube can theoretically be used to measure any fluid flow rate, they are most often incorporated into the aircraft to determine the air speed during flight. Henri Pitot is attributed with the invention of Pitot's tube in 1732 during the study of the pressure of the Seine River in France and French scientist Henry Darcy modified his design for the use of aircraft in the mid -19th century.

as a form of pressure measurement measures average speed, but instead a single point of velocity in the current. Flow rate of fluids cannot be measured by the flow of Pitot's tubesICE separately on the aircraft, as they also require measurement of external air pressure to calculate speed. Therefore, these devices calculate what is called stagnation pressure, or the air pressure exerted as it enters the pitot tube and rises through the holes connected by pressure at the other end. Static pressure is calculated by static ports generally mounted on the side of the fuselage, while the pitch tube flow is based on the pitch tube, which is often mounted on the boom that stretches from the nose of the aircraft.

With the flow of the Pitot tube, the stagnation pressure is calculated by adding a standard atmospheric static pressure to a dynamic pressure exerted on the interior of the Pitot tube. At the back of the Pitot tube is a circle of holes and a central output hole, both connected to a pressure converter. When the air leaves these holes, pressure differences use Transducer for calculated dynamic air pressure. Bernoulli equation states that static air pressure and dynamic air pressure equal to total air pressure, which isIn this case, the pressure of the Pitota tube stagnation.

When the pressure of stagnation is known, as well as local air density, Bernoulli's equation can be used to calculate the speed of the aircraft through which the Pitot tube flows through. Although it is reliable under ideal conditions, low air velocities often represent such small pressure changes in the pitch tube flow, which pressure converter can often fail exactly when calculating, resulting in incorrect speed. When they were icy, there were also several fatal air accidents including defective values ​​of the Pitot Tube tube, and changed the air flow, so that the built -in condemnation heaters are now integrated into the tubes to prevent such tragedies in the future. Adjustments can also be made for unique conditions, such as low air speed or supersonic flight, so the Pitot tube generates accurate readings.