Venturi flume for measuring water in open channels, in order that those in practical need of such a device may know of its existence. Pdf experimental investigation of the installation. Discharge coefficient performance of venturi, standard concentric orifice plate, vcone, and wedge flow meters at small. It is used to calculate the velocity of fluids in running through a pipeline. If the velocity at any point decreases, the pressure at that point increases due to the conservation of the kinetic energy into pressure energy. Its basic principle is also depends on the bernoulli equation i. Wallaces hints regarding common strengths and weakness of each section of a lab report a sample cover memo. The experiment that has been conducted made use of the venturi and orifice meters in determining the head loss and coefficient of discharge for each flowmeters. In venturi, pressure energy pe converted into kinetic energy ke to calculate flow rate discharge in a closed pipeline. Venturi meters are used for measuring the flowrate of both compressible and incompressible fluids in a pipeline. As the fluid enters in the throat, its velocity increases and pressure decreases. The adjustable screws are adjusted to level the venturi meter. Measuring tank description of experimental setup a tube is connected to each to the inlet and outlet of a venturi meter. All fluid meters, however, consist of two distinct parts, each of which has different functions to perform.
The throat length of these meters is equal to the throat diameter. Pdf discharging characterstics of venturimeter for sediment. A venturi meter is used to measure the flow rate through a tube. Differential pressure type flow meters head flow metersmeasure flow rate by introducing a constriction in. Daniel measurement and control white papersfundamentals of orifice meter measurement page 1 fluid meters are divided into two functional groups one measures quantity positive displacement. It is the portion that lies in between the converging and diverging part of the venturi. Energy losses through venturi, orifice, and rotameter flowmeters. Detailed information about these components is given in this chapter. Apr 04, 2020 a venturi meter, or venturi flow meter, is a device used to measure the velocity, or flow rate, of fluid flowing through a pipeline. It is a cheaper device as compared to venturimeter.
A diagnostic system for venturi meters in single phase and wet gas flow applications. It was created at utah state university by professor boyd f. There is a pressure tap upstream from the orifice plate and another just downstream. Experimental and cfd analysis of flow through venturimeter. Bsen 3310 lab 2calibration of orifice flow meter and.
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. 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. 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. The venturi meter is invented by an american engineer clemans herchel 18411932 and named him after italian giovanni venturi 18421932. Discharge coefficient performance of venturi, standard. Differential pressure type flow meters head flow metersmeasure flow rate by introducing a constriction in the flow. Flow through venturi meter background and theory introduction flow meters are used in the industry to measure the volumetric flow rate of fluids.
Such a device is called a venturi meter since it relies on the venturi effect. The venturi flow meter obtains a pressure differential by constricting the flow area and therefore increasing the velocity at the constriction, which creates a lower pressure according to bernoullis theorem. Experiment 1 report flow through a venturi meter group members. Construction and specification of venturi meter venturi is an example for restriction type flow meter. Venturi meter a venturi meter is a tube with a constricted throat that increases velocity and decreases pressure see figure 1.
Venturimeter is an application of bernoullis equation. Fm 308 flow measurement by venturi and orifice meter. The venturi meter constricts the flow using a herschel venturi tube. A schematic of the venturi meter is shown on the diagram at the end of the procedure. Daniel measurement and control white papersfundamentals of orifice meter measurement page 1. The venturi flow meter consists of a streamlined contraction and a streamline expansion as shown the diagram. Venturi flow meter installation and operation manual designs, materials, weights and performance ratings are approximate and subject to change without notice. Bsen 3310 lab 2calibration of orifice flow meter and venturi. A cfd simulation of water flow through a venturi meter article pdf available in international journal of current research vol 6issue 3. Report on the centrica venturi meter prognosis flow. The principle of the orifice meter is identical with that of the venturi meter. At this condition the maximum pressure difference between the venturi inlet and throat should be 240 millimeters.
The venturi meter is an obstruction meter named in honor of giovanni venturi 17461822, an italian physicist who first tested conical expansions and contractions. It is based on the use of the venturi effect, the reduction of fluid pressure that. To find the coefficient of discharge for orifice meter. It is an edited student report and contains some incorrect statements and formatting, and describes questionable experimental procedures.
Venturi meter and orifice meter are the commonly used flow meters for measuring massvolumetric flow rate or velocity of the flowing fluid. 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. Aug 20, 2016 this is a demonstration of bernoullis principle using a venturi tube. This is a demonstration of bernoullis principle using a venturi tube. This also work on the same principle as that of venturimeter. It is one of the most accurate means of measuring the flow. Venturi flow meter installation and operation manual. Venturimeter principle, construction and working with diagram. It is that portion of the venturi where the fluid gets converges.
Compared with other head meters, such as the venturi meter and the nozzle, the orifice meter is less expensive to fabricate and install. Introduction there are many different meters used to measure fluid flow. Then there is a short section at the reduced diameter, known as the throat of the meter. The tube connected to the outlet of the venturi meter is connected to the measuring tank. To find the coefficient of discharge for venturi meter. Figure 1 venturi meter h5 the venturi meter has three main. Sample formal report a chemical engineering 4903 and 4905 the following sample laboratory formal report is not intended to represent the scope and depth of the projects assigned to students. Definition, parts, working principle, derivation, applications with pdf. It has a converging cone of 21 1 and a diverging cone of 7 to 8 see. Venturi meter and orifice plate effects are two main and very important phenomenas in fuild mechanics sub field of mechanical engineering. An annotated sample lab report prepared on a fluids experiment.
The venturi effect is named after its discoverer, giovanni battista venturi. Flow through a venturi meter from maae 2300 at carleton university. A venturi meter, or venturi flow meter, is a device used to measure the velocity, or flow rate, of fluid flowing through a pipeline. It basically works on the principle of bernoullis theorem. Differential pressure type flow meters head flow meters measure flow rate by introducing a constriction in the flow. The bernoulli balance was applied to the inlet line i. Fm 308 flow measurement by venturi and orifice meter objectives. Venturimeter principle, construction and working with. Pdf a cfd simulation of water flow through a venturi meter.
To determine the coefficient of discharge of the orifice meter 1. View test prep venturimeter final report group 6 2. The orifice flow meter, flow nozzle meter, and venturi meter are three commonly used types of differential pressure meter for pipe flow measurement. A new correlation of wet gas flow for low pressure with a. Then there is a diverging section in which the cross sectional area for flow is gradually increased to the original diameter. The orifice meter consists of a flat orifice plate with a circular hole drilled in it.
Definition, parts, working, derivation, applications. The inlet diameter equals d 26 mm and the throat diameter d 16 mm. Ce 321 sample laboratory report packet this packet contains the following materials to help you prepare your lab reports in ce 321. The venturi effect is the reduction in fluid pressure that results when a fluid flows through a constricted section or choke of a pipe. The concentric orifice plate flow meter reduces the pressure by forcing the fluid through a thin plated circular opening. Jun 01, 2018 venturimeter vs orifice meter in hindi.
As the liquid flows through the pipeline, the device measures the pressure of the liquid before it enters the venturi tube and as it exits the. The herschel venturi pipe used in this experiment is a form of a venturi meter that is used to measure the flow of the water through the pipe by measuring the pressure difference between two sections of the pipe. Venturimeter is the most widely used device to measure the discharge through the pipe. Adjust both the bench supply and the apparatus control valves to obtain full flow. 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. Venturi meter is a device or component which is used for measuring the rate of. Department of mechanical engineering venturi meter. A venturi meter is also called a venturi flowmeter. Venturi meterconstruction, working, equation, application.
This lab report was written by levi lentz with the data obtained by group e. 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. Venturi tube exit 2 venturi 3 venturi system venturi entrance 2 water level in pail 4. Nov 20, 2016 venturi meter and orifice plate effects are two main and very important phenomenas in fuild mechanics sub field of mechanical engineering. To find the water flow rate using the venturi meter and the pressure distribution along the meter. In a venturi meter there is first a converging section in which the cross sectional area for flow is reduced.
Materials and methods a manometer figure 1, an orifice flow meter figure 2, and a venturi flow meter figure 3 were used to measure the flow rate and pressure change of the water flowing through the pipes. A venturi meter may also be used to increase the velocity of any type fluid in a pipe at any particular point. As the liquid flows through the pipeline, the device measures the pressure of the liquid before it enters the venturi tube and as it exits the constricted area. Venturi meter is a device used to measure the flow rate or discharge of fluid through a pipe. The cross section of the throat is much less than the cross section of the converging and diverging parts. Determined values for the coefficient of discharge for the venturi meter.
Observation and analysis of results, conclusion, recommendation free download as word doc. A venturi is a convergingdiverging nozzle of circular crosssection. The flow measuring apparatus is used to familiarize the students with typical methods of flow. All three use a constriction in the flow path like an orifice plate to cause a pressure drop across the meter that can be measured and correlated with flow rate. An underappreciated option for measuring agricultural water. This is considered by many users to be the standard or classical venturi meter. A simple, inexpensive venturi experiment applying the.
The original, or classical, venturi was invented by a u. The principle of venture meter is firstly developed by g. Energy losses through venturi, orifice, and rotameter. Che241 lab report flowmeter measurement apparatus fm101 2015. The report is normally bound in some kind of report cover, and the cover letter is attached to the formal report by a paper clip. Pdf che241 lab report flowmeter measurement apparatus. One of the favored meters for wet gas flow is the venturi meter which features a simple structure and reliable durability and has been used in many laboratories for the reason that the venturi meter is much more predictable and repeatable than the orifice meter for a wide range of flow conditions. Calibration of an orifice plate flowmeter mechanical engineering department king saud university riyadh submitted by. Observe the water levels for a few minutes to ensure the purge valve is scaling properly.
From the experiment, we successfully obtained the head loss and coefficient of discharge with comparison of pressure drop. In your laboratory reports must have the followings. It shows that venturi meter is more accurate compare to orifice. Pipe flow measurement with a differential pressure flow. Department of mechanical engineering venturi meter objective. Pdf the sensitivity of flow meters to their operational conditions continues to be a source of concern to both flow meters. In simplest form, the pitot tube consists of a glass tube, bent at right. In principle the constriction could be an abrupt change of crosssection, but it is better to use a more gradual constriction and an even more gradual return to the full flow area following the constriction. The venturi flow meter obtains a pressure differential by constricting. The pressure along the meter is obtained using the 11 pressure taps at the locations shown on the diagram. It consists of flat circular plate which has a circular hole, in concentric with the pipe.
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