A venturi meter is used to measure the flow rate through a tube or volumetric flow rate, q. The inlet diameter equals d 26 mm and the throat diameter d 16 mm. Bernoullis principle and the equation of continuity. Pdf this study intended to concretize bernoullis principle through a lowcost venturi meter designed and constructed by the researchers. Venturi meterconstruction, working, equation, application. The equation for venturi meter is obtained by applying bernoulli equation and equation of continuity assuming an incompressible flow of fluids through. Venturi meter is a device or component which is used for measuring the rate of flow of liquid through pipes. Venturi meter problem 1 fluid dynamics fluid mechanics duration. To calculate the flowrate of a fluid passing through a venturi, enter the parameters below. Energy losses through venturi, orifice, and rotameter flowmeters. Pdf discharge equations for venturimeter and orificemeter. A venturi meter is used to measure the flow rate through a tube. In venturi, pressure energy pe converted into kinetic energy ke to calculate flow rate discharge in a closed pipeline. This equation is valid for incompressible and inviscid fluids so it can be used only at.
Fm 308 flow measurement by venturi and orifice meter objectives. A venturi tube can also be used to mix a liquid with a gas and siphon into the venturi flow. This physics video tutorial provides a basic introduction into the venturi meter and how it works. Definition, parts, working, derivation, applications. Pdf using experimental curves for the discharge coefficients of venturimeter or orificemeter, the pipe discharge is obtained iteratively. The pressure at the entrance to the meter is gauge and it is undesirable that the pressure should at any point, fall below absolute. The basic equation for the venturimeter is obtained by writing the bernoulli equation for incompressible fluids between the two sections a and b. Fm 308 flow measurement by venturi and orifice meter. Fm 308 flow measurement by venturi and orifice meter chemical. Construction and specification of venturi meter venturi is an example for restriction type flow meter.
It works on the basic principle of bernoullis equation. Department of mechanical engineering venturi meter. The pressure difference between the upstream and the downstream flow, h, can be found as a function of the flow rate. The venturi meter is constructed as shown in figure 2. Definition, parts, working principle, derivation, applications with pdf. It is a cheaper device as compared to venturimeter.
Writing bernoullis equation between section 1 and 2 we have. A schematic of the venturi meter is shown on the diagram at the end of the procedure. Venturi meter problems, bernollis principle, equation of continuity. Venturi meter problems, bernollis principle, equation of. To find the coefficient of discharge for orifice meter. This also work on the same principle as that of venturimeter. Venturi meter and orifice meter are the commonly used flow meters for measuring massvolumetric flow rate or velocity of the flowing fluid. Venturi flow equation and calculator engineers edge. These changes can be used to measure the flowrate of the fluid. It consists of flat circular plate which has a circular hole, in concentric with the pipe. Its a device used to measure the velocity of a fluid in a tube.
Gahlot 1994 investigated the characteristics of a conventional venturimeter and an. A fluid passing through smoothly varying constrictions experience changes in velocity and pressure. Energy losses through venturi, orifice, and rotameter. Applying bernoullis equation to points and of the venturi.
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