As shown in Figure 13, the pitot tube is a tube within a tube. The 'Pitot Tube' is named after the French physicist Henri Pitot. A single hole with a pitot tube and manometer can be used to measure the velocity pressure. The coefficient C is about 1.00 (☐.01) for simple Pitot tube and for Pitot- static tubes it may be around 0.98 to 1.00.Ĭalculate the velocity of water flowing in a pipe having installed with a pitot tube which has coefficient of 0.98 and the stagnation pressure is 5.67 m and the static pressure head in the pipe is 4. It is not necessary to drill two holes in a piece of duct work to measure velocity pressure. They are used for mapping flow profile in a channel or duct.
It is used in aircraft to measure air flow velocity. It is used in the air duct and pipe system. The impact pressure is the pressure which is exerted by the fluid when a tube in inserted in it flow stream and static pressure is the pressure exerted by the fluid on the side wall of the tube at same position. Applications of pitot tube The pitot tube is used in utility streams where high accuracy is not necessary. The Pi, impact pressure and Po, static pressure are pressures obtained from pitot tube. A manometer which is filled with manometric fluid such mercury or ccl4 can find the pressure difference when connected to the Pitot tube outlet end points. A numerical example of measuring fluid velocity using a pitot tube.Please provide feedback on this tutorial by selecting 'Like' or 'Dislike'. It is simple in construction and easy in application, let make ourselves comfortable to understand how pitot tube can help in determine a velocity variable. It works on the principle of using pressure difference to find the velocity between the pressure points of measuring.
To measure local velocity in a pipe or to calculate a point velocity in open air stream Pitot tube is used.