![]() When the fluid passes through the narrowest section of the tube, known as the throat, its velocity increases while the pressure decreases. Similar to Pitot tubes, Venturi meters also rely on Bernoulli’s principle and the concept of differential pressures to measure fluid flow. A simple diagram of a Venturi meter is shown below. The Venturi meter, named after Italian physicist Giovanni Venturi, consists of a converging section, a throat, and a diverging section. ![]() It is important to note that the pressure transducer used with Pitot tubes measures the pressure difference between the total and static pressures, rather than their absolute values. P t = total pressure experienced at the center tube.Consequently, the velocity of the fluid can be derived using the formula: This means that the pressure in the center tube is equal to the total pressure, which includes both the static pressure and the dynamic pressure caused by the fluid’s velocity.īy measuring the difference in pressure between these tubes and using Bernoulli’s principle, the value of the dynamic pressure can be obtained. On the other hand, the center tube, which is oriented in the direction of travel, is pressurized both by the random and the ordered air velocity. This means that the pressure in these tubes is equal to the static pressure of the fluid. Since the outside holes are oriented perpendicular to the fluid flow, the tubes connected to them are pressurized only by the local random component of the air velocity. It typically does this by measuring the strain in a thin element using an electronic strain gauge. Both ends of the tubes are connected to a device called a pressure transducer, which measures the difference in pressure between the two sections. The center hole is positioned to always face the direction of the fluid flow being measured, while the openings of the outer holes are perpendicular to the fluid flow. The center hole in the tube is kept separate from the outside holes, as shown in the diagram below. The Pitot tube, named after French engineer Henri Pitot, is composed of a slender tube with small holes drilled around its exterior and a center hole running along its axis.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |