Experimental investigation of the installation effects on the venturi flow meter performance. The initial cost of a venturi meter the classical venturi is limited in its application the beta ratio of a vcone is so defined that an orifice and a v 20150302 venturi meter experiment applications of bernoullis principle is venturimeter and orifice meter diagram and explaination in. The restriction diameter should not be less than 0. A venturi meter is used to measure the flow rate through a tube. The venturimeter is an obstruction type flow meter named in honor of giovanni venturi 174611822, an italian. Pressure recovery for venturi tubes is a lot better as compared to the orifice plates. In venturi tubes, pressure loss is low and viscosity effect is high.
The original, or classical, venturi was invented by a u. In venturi, pressure energy pe converted into kinetic energy ke to calculate flow rate discharge in a closed pipeline. Its value varies slightly from one meter to another, and, even for a given meter it may vary slightly. It is that portion of the venturi where the fluid gets converges. Fm 308 flow measurement by venturi and orifice meter. Venturi flow meter installation and operation manual. The whole assembly of venturi meter, manometer tubes, scale and manifold is supported on a base mounted on adjustable screwed feet. To find the coefficient of discharge of an orifice meter. Jan 17, 2018 basics of differential flow devices venturi tubes, orifice plates, and flow nozzles duration. Its a device used to measure the velocity of a fluid in a tube. A simple, inexpensive venturi experiment applying the. Fm 308 flow measurement by venturi and orifice meter objectives. A venturi meter is a device which is used for measuring the rate of flow of fluid through the pipe. This experiment made use of a venturi meter to allow for the.
In addition, cfd modeling was conducted to to simulate laminar flow in a venturi meter. There are many different meters used to measure fluid flow. Energy losses through venturi, orifice, and rotameter flowmeters. Construction and specification of venturi meter venturi is an example for restriction type flow meter. When comparing the reynolds number to cd for the venturi meter the graph remained relatively linear until there was a drastic. Seminar assignments, questions and answers lab experiment. Venturi flow meter working principle animation when a venturi flow meter is placed in a pipe carrying the fluid whose flow rate is to be measured, a pressure drop occurs between the entrance and throat of the venturi meter. Apr 26, 2015 15 venturi meter vs flow when a venturimeter is placed in a pipe carrying the fluid whose flow rate is to be measured, a pressure drop occurs between the entrance and throat of the venturimeter.
One measures the pressure difference between the venturi inlet and neck, and from this the flowrate can be determined. Introduction the orifice meter, the nozzle meter, and the venturi meter are the most common devices used to. It is based on the use of the venturi effect, the reduction of fluid pressure that results when a fluid runs through a constricted. Venturimeter engineering explained engineeringclicks. Department of mechanical engineering venturi meter objective. A venturi meter is also called a venturi flowmeter. Dimensions of the venturi used in the experiment as indicated in figure 3 below. To determine the coefficient of discharge of the orifice meter 1. The venturi meter, also known as venturi tube, belongs to the category of variable head flowmeters. Determination of coefficient of discharge for venturimeter. Just like electromagnetic flow meter, it has no pressure drop head loss hence is very useful in places where pressure drop should be minimal and where a. A venturi meter is basically a type of flow meter with a specially designed tube, used to measure the flow velocity of liquids especially highly viscous liquids. Figure 1 venturi meter h5 the venturi meter has three main.
Experimental and cfd analysis of flow through venturimeter to. Detailed information about these components is given in this chapter. An annotated sample lab report prepared on a fluids experiment. Determine the relationship between reynolds number and the coefficient of discharge.
He also noticed that the introduction of an orifice meter into a pipeline is necessary as this causes a change in the kinetic of the fluid. It is used to calculate the velocity of fluids in running through a pipeline. It is one of the most accurate means of measuring the flow. Venturi meter apparatus with using venture meter, which is procured from tecquipment company, it is possible to see and measure the complete static head distribution along a horizontal venture tube, figure 1. Pdf experimental investigation of the installation effects on the. Name of experiment date of performance experiment marks teachers signature 1. This type of a venturi meter is also known as the herschel type and it consists of a smooth gradual contraction from the main pipe size to the throat section, followed by a smooth. Pdf experimental investigation of the installation effects. A venturi tube contains a throat which is smaller in a diameter to the pipeline, into which it fits. The orifice meter consists of a flat orifice plate with a circular hole drilled in it. The principle of the orifice meter is identical with that of the venturi meter. Pdf cfd analysis of flow through venturi tube and its discharge.
This pressure drop is measured using a differential pressure sensor and when calibrated this pressure drop becomes a measure of flow rate. Pdf venturi tube plays a very important role in different fields of engineering. If you continue browsing the site, you agree to the use of cookies on this website. To find the water flow rate using the venturi meter and the pressure distribution along the meter. The major objective of this experiment was to construct, test and model a simple, inexpensive venturi meter. In this post the effect of venturi meter and orifice plate on the fluid flow will be disciussed and complete work will be presented in the form of report. As the fluid from the entry section of venturi meter flows into the converging section, its pressure keeps on reducing and attains a minimum value p2 when it enters the throat. Video of a venturi meter used in a lab experiment idealized flow in a venturi tube the venturi effect is the reduction in fluid pressure that results when a fluid flows through a. In this meter, the fluid is gradually accelerated to a throat and then gradually retarded in diverging section where the flow channel expands to the pipe size. The meter consists of a pipe with a narrowing throat that expands back to its original diameter on the other side of the choke point. Differential pressure type flow meters head flow meters measure flow rate by introducing a constriction in. Introduction there are many different meters used to measure fluid flow.
Experiment 1 experiment 1 flow through a venturi meter. Furthermore, it is hoped that the construction of larger sizes of venturi flumes than were tested in the laboratory will be encouraged thereby and that they can be calibrated. Venturi meter is a device or component which is used for measuring the rate. Ce272 fluid mechanics sessional lab manual department of civil engineering ahsanullah university of science and technology. Flow through venturi meter background and theory introduction flow meters are used in the industry to measure the volumetric flow rate of fluids. To determine the coefficient of discharge of orifice meter. Pdf flow through a venturi meter orifice rotameter emmanuel. It consists of flat circular plate which has a circular hole, in concentric with the pipe. The standard deviation, for cd was also calculated to be. Nov 16, 2017 this physics video tutorial provides a basic introduction into the venturi meter and how it works. The apparatus used on this experiment also has a number of straight tube manometers at equally spaced intervals. However due to a problem with the apparatus and a constantly fluctuating venturi meter, a camera was used to take a photo. Figures 1 and 2 show the details of the apparatus for this experiment. Venturi meter is a device or component which is used for measuring the rate of flow of liquid through pipes.
Differential pressure type flow meters head flow meters measure flow rate by introducing a constriction in the flow. It may be noted that in the usual form of venturi meter intended for flow measurement, pressure tappings are made only at the entrance and at the throat, as these two readings suffice to measure the discharge. The venturi meter is an obstruction meter named in honor of giovanni venturi 17461822, an italian physicist who first tested conical expansions and contractions. This also work on the same principle as that of venturimeter. The venturi meter has a converging conical inlet, a cylindrical throat and a diverging. Pdf experimental investigation of the installation. The experiment was carried out per the instructions outlined in the course manual. Experimental investigation of the installation effects on the venturi flow meter performance conference paper pdf available june 2000 with 2,477 reads how we measure reads. To find the coefficient of discharge for venturi meter. The purpose of the experiment is to demonstrate typical flow measurement. Calculate the coefficient of discharge from experimental data for a venturi meter.
The venturi meter is invented by an american engineer clemans herchel 18411932 and named him after italian giovanni venturi 18421932. It consisted of a 21 conical contraction, a straight throat of diameter d and. Graf 1967 carried out an experiment on venturimeter to modify it for. A venturi meter is a variable head meter, which is used for measuring the flow rate of a fluid through a pipe. Fm 308 flow measurement by venturi and orifice meter chemical. If the velocity at any point decreases, the pressure at that point increases due to the conservation of the kinetic energy into pressure energy.
Venturi meters have only a small head loss, no moving parts. Venturimeter is the most widely used device to measure the discharge through the pipe. It is the portion that lies in between the converging and diverging part of the venturi. Venturi flow meter installation and operation manual designs, materials, weights and performance ratings are approximate and subject to change without notice. Definition, parts, working, derivation, applications.
Seminar assignments, questions and answers lab experiment no. He also observed that the meter was good for the study of fluid. More specifically, this simple venturi meter, constructed from materials available at a local hardwareauto parts store, was characterized by determining the venturi coefficient and the permanent pressure loss. The fluid whose flow rate is to be measured enters the entry section of the venturi meter with a pressure p1. In this experiment the flow k and discharge cd coefficients of a venturi meter will be assessed by comparing the real discharge measured in the experiment with the theoretical discharge calculated by deriving venturi discharge formula from bernoulli and continuity equations. Wallaces hints regarding common strengths and weakness of each section of a lab report a sample cover memo. A schematic of the venturi meter is shown on the diagram at the end of the procedure. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Water from the hydraulic bench enters the equipment through a venturi meter. The coefficient of discharge c d for a venturi meter is in the region of 0. Venturi meter problems, bernollis principle, equation of. Furthermore, still in the field of hydraulic experiment, a scientists called venturi after 7000 ad discovered a venturi meter. Using bernoullis equation, pressure and flow rate were calculated, and static and dynamic pressure were identified.
Venturi meter posted on march 15, 2011 april 4, 2012 by mrsoltys a venturi meter is a device that allows flow rates through pipes to be calculated by measuring the difference in pressure created by a contraction in a pipe. Cd for the venturi meter decreased as the flow rate decreased with each trial. Conclusion in this experiment cd, the coefficient of discharge, was calculated for the venturi meter. Department of mechanical engineering venturi meter. Ce 321 sample laboratory report packet this packet contains the following materials to help you prepare your lab reports in ce 321. A wide variety of venturi meter options are available to you, there are 302 suppliers who sells venturi meter on, mainly located in asia. Pdf flow through a venturi meter orifice rotameter.
In simplest form, the pitot tube consists of a glass tube, bent at right. Pdf effect of geometrical parameters of venturimeter on. Objective the main objectives of this experiment is to obtain the coefficient of discharge from experimental data by utilizing venturi meter and, also the relationship between reynolds number and the coefficient of discharge. Conclusion in this experiment cd the coefficient of. Flow through venturi meter background and theory introduction flow meters are used in the industry to measure the volumetric flow rate of fluids of the modern venturi meter in 1886 by clemons herschel. Venturi flume for measuring water in open channels, in order that those in practical need of such a device may know of its existence. The inlet diameter equals d 26 mm and the throat diameter d 16 mm.
The main objectives of this experiment is to obtain. To find the coefficient of discharge for orifice meter. A venturimeter is a device used for measuring the rate of a flow of a fluid flowing through a pipe. Pdf the sensitivity of flow meters to their operational conditions continues. Predictionof discharge coefficient of venturimeter at low. Definition, parts, working principle, derivation, applications with pdf. Venturimeter in a venturi meter there is first a converging section in which the cross sectional area. Energy losses through venturi, orifice, and rotameter. The pressure along the meter is obtained using the 11 pressure taps at the locations shown on the diagram. The objectives was to gain additional insight into low reynolds number flows in venturi meters. Venturi meterconstruction, working, equation, application. Differential pressure type flow meters head flow metersmeasure flow rate by introducing a constriction in the flow.
The aim of this experiment is to study the overall meter coefficient c of venture meter and orifice plate. Introduction a venturi meter is a device for determining the flowrate of a fluid down a pipe. The objective of this experiment is to locate the centre of pressure of an immersed. The principle of a venturi meter is depicted in figure 12. In industrial applications the knowledge of this effect is used to predict how a fluid will react when flowing through various stages of constricted pipes. To determine the coefficient of discharge of the venturimeter 2. It is a cheaper device as compared to venturimeter. A venturimeter or current meter is used to calculate the change in flow rate through a choked tube as described by the bernoulli equation. Venturi meter and orifice meter are the commonly used flow meters for measuring massvolumetric flow rate or velocity of the flowing fluid. There is a pressure tap upstream from the orifice plate and another just downstream. A venturi is a convergingdiverging nozzle of circular crosssection. Orifice meter, installed on different pipes, arrangement of varying flow rate, u tube manometer, collecting tube tank, vernier calliper tube etc.
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