A venturi meter is a device used to measure the flow rate of a fluid in a closed system. It consists of a constricted tube, called a venturi, which causes a pressure drop in the fluid. This pressure drop can then be used to calculate the flow rate.
A venturi meter works by utilizing the principle of Bernoulli's equation, which states that as the velocity of a fluid increases, the pressure decreases. The venturi meter has a narrow throat in the middle, which causes the fluid to speed up and create a low-pressure area. This pressure difference is then measured and used to calculate the flow rate.
One of the main advantages of using a venturi meter is its accuracy. It can provide precise measurements even for highly viscous fluids. Additionally, it has a simple design, is easy to install, and has a low maintenance cost.
While venturi meters are highly accurate, they do have some limitations. They are not suitable for measuring fluids with high solid content, as this can cause clogging in the narrow throat. They also have a limited range of flow rates that they can accurately measure.
A venturi meter can be calibrated by comparing its readings to a known standard. This is typically done using a calibration rig that can provide a range of flow rates. The readings from the venturi meter are then compared to the known flow rates to determine its accuracy and make any necessary adjustments.
