Generate a ms excel based engineering data sheet of results or print a summary. To find the coefficient of discharge for orifice meter. Free download 64 is not responsible for software you are downloading nor for details provided about the software daniel orifice flow calculator 3. However this meter is relatively complex to construct and hence expensive. Orifice plate, a restriction used to measure flow or to control pressure or flow, sometimes given specialised names. The water flow rate can be adjusted using the valves on the hydraulics bench. Orifice meter are depending on bernoullis equation. Venturi and orifice laboratory 3 venturi meter and orifice.
Daniel orifice flow calculator free download information. Orifice meter article about orifice meter by the free. An orifice is an opening in the side or base of tank or reservoir through which fluid is discharge in the form of a jet. Determination of coefficient of discharge orifice meter experiment. The arrangement of orifice meter is much economical than the use of the venturi meter, but as seen in this experiment the venturi meter provide more accurate results that the orifice meter, so the choice of which to use in a specified laboratory depends on the financial ability of the organization occupying the device and on the accuracy. The orifice meter, sometimes called the head loss flow. The location, size and construction of the orifice meter pipe taps can affect the meters accuracy. It may be installed in pipeline with a minimum of trouble and expense. Manometers measure the total head on the orifice and under the jet.
The pressure along the meter is obtained using the 11 pressure taps at the locations shown on the diagram. The discharge will depend up on the head of the fluid h above the level of the orifice. Orifice meter maintenance consists of periodic inspection as indicated. Theory overview of flow measurement using differential. Orifice meter definition and meaning collins english. In this experiment, the measurement of flow rate with the principle of pressure. If the velocity at any point decreases, the pressure at that point increases due to the conservation of the kinetic energy into pressure energy. Orifice line position the position of the orifice line is critical for maintaining accurate data. It is a cheaper device as compared to venturimeter. Daniel, flange union, daniel industries orifice plate created date. The venturi is widely used particularly for large volume liquid and gas flows since it exhibits little pressure loss.
Venturi meter, orifice meter, and pitot tube are widely used head flow meters in the industry. To determine the coefficient of discharge of an orifice meter. Pdf design and validation of a precision orifice meter. An orifice is any opening, mouth, hole or vent, as in a pipe, a plate, or a body.
However, for smaller pipes orifice meter is a suitable choice. One, the venturi meter, is a device used for measuring the rate. To find the coefficient of discharge for venturi meter. Experimental investigation of the installation effects on the venturi flow meter performance. Sep 30, 2016 determination of coefficient of discharge orifice meter experiment. However this meter is relatively complex to construct and hence. Fm 308 flow measurement by venturi and orifice meter. Even if we try to check the files for viruses, we cannot. Meters should have at least 10 pipe diameters of smooth, clean, straight pipe upstream and downstream for accurate readings. Orifice meter the venturi meter described earlier is a reliable flowmeasuring device. Periodically the master meter is returned to a standards lab or to the. Flow measurement orifice meter 1 flow measurement orifice meter by. As the fluid approaches the orifice the pressure increases slightly and then drops suddenly as the orifice is passed.
For these reasons it is widely used, particularly for large volume liquid and gas flows. Large diameter orifice flow meter calculation for liquid flow. The basic equation for the orifice meter is obtained by writing the bernouli equation for the incompressible fluids across the upstream cone. These results show shifts in orifice meter discharge coefficients that are. Characteristic curve of orifice meter cfd and experimental data from 4. Body orifice, any opening in the body of a human or animal. Orifice meter tubes objective is to measure the amount of natural gas flow that is being transferred, and in the process stabilizes the turbulence thus it can obtain an accurate measurement of gas flow. In simplest form, the pitot tube consists of a glass tube, bent at right. Fm 308 flow measurement by venturi and orifice meter objectives.
In order to use any of these devices for measurement it is necessary to empirically calibrate them. An orifice meter is basically a type of flow meter used to measure the rate of flow of liquid or gas, especially steam, using the differential pressure measurement principle. The downstream bore of the orifice is chamfered at 40 to provide an effective orifice plate thickness of 0. Calibrated orifice, used to control pressure or flow. Chhorlyheang chres purpose the purpose of this lab is to understand behavior the flow through a venturi meter and an orifice plate by examining the effect of discharge.
The orifice flange union ofu was the only orifice plate holder available until the invention of the orifice fitting or meter. 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, we will use the data extracted from our experiment to determine the discharge coefficients of those devices. Mar 02, 2015 determination of coefficient of discharge orifice meter experiment. Orificemeter is a device used for measuring the rate of fluid flowing through a pipe. Nov 25, 2016 orifice coefficients are smaller and more variable than those for the venturi and the quantitative treatment of the orifice meter is modified accordingly. 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. Orifice flanges are one of the most economical means of measuring flow, and daniel orifice flanges are manufactured to be the most accurate.
Pipe with an orifice flow meter, pump with flow control valve, manometer, weighing tank, stop watch. Orifice meter flow measurement fluid mechanics scribd. Venturi and orifice laboratory 3 venturi meter and. Fundamentals of orifice metering smith metering, inc throughout the oil and gas industry, there stems the need for accurate, economical measurement of process fluids. There is no way of determining the value of k except by experiment. There are 0 essential ancillaries for the flow through an orifice h33 experiment jet. Fm 308 flow measurement by venturi and orifice meter chemical. Large diameter orifice flow meter calculation for liquid flow computes flowrate, orifice diameter or differential pressure for pipe diameter 50 mm based on iso5167 checalc chemical engineering calculations to assist process, plant operation and maintenance engineers. Orifice meter free download as powerpoint presentation.
An orifice meter is a piece of equipment used to measure the flow rate of a gas or a fluid. Qk h where is the meter calibration constant and is the manometer reading that measures the pressure drop before and after the orifice. The purpose of this experiment is to study the flow through orifice meter. The original orifice plate holding device was the orifice flange union figure 1.
Orifice flange unions consist of two ansirated flanges usually. To determine the coefficient of discharge of the orifice meter 1. Download orifice design calculator a straightforward tool that can used to size orifice plates square edge orifices. Venturi meter and orifice meter are the commonly used flow meters for measuring massvolumetric flow rate or velocity of the flowing fluid. If water current or flow is pushing against the end of the orifice line, it will cause a pressure to be placed on the line that is not related to the water depth.
Flow meters are used in the industry to measure the volumetric flow rate of fluids. A cylindrical tank with an adjustable diffuser that demonstrates flow through different orifices for different flow rates. Furthermore, we will use the data extracted from our experiment to determine the discharge coefficients of those. Gaskets are provided to seal both sides of the plate. Flow through orificemeter video of experiment youtube. Download daniel orifice flow calculator at free download. It consists of flat circular plate which has a circular hole, in concentric with the pipe. A set of interchangeable orifices and nozzles for use with the h4 flow through an orifice apparatus.
Orifice coefficients are smaller and more variable than those for the venturi and the quantitative treatment of the orifice meter is modified accordingly. This experiment will introduce you to two devices that are used to measure flow. A traverse assembly holds a pitot tube which students can position anywhere in the jet. A schematic of the venturi meter is shown on the diagram at the end of the procedure. A nozzle, venturi or thin sharp edged orifice can be used as the flow restriction. Orifice meter merchant institute of technology,piludara prepared by. An orifice meter is a conduit and a restriction to create a pressure drop. Pressure drop across the orifice meter was measured with the help of manometer mounted on flange taps of the meter. Orifice meter tubes flow meters by fab industries, inc. The jet that leaves the orifice discharges into the hydraulic bench measuring tank. As the name implies, it consists of an orifice plate which is the basic element of the instrument. Pdf experimental investigation of the installation effects.
The basic equation for the orifice meter is obtained by writing the bernouli equation for the. Orifice metering satisfies most flow measurement applications and is the most common flow meter in use today. The orifice plate is used to estimate the flow rate of a mass flowing through a pipe. Technical note 12, differential pressure mass flow meter, rev. Pdf experimental investigation of the installation. Design and validation of a precision orifice meter for ventilation rate control in opencircuit respiration chambers.
Cfd simulations have been carried out and compared with experimental data using water up to 3 ms. Orifice flow meter s are ideal for measuring air and gas flows in combustion systems. Oct 03, 2015 an orifice meter is basically a type of flow meter used to measure the rate of flow of liquid or gas, especially steam, using the differential pressure measurement principle. The location, size and construction of the orifice meter pipe taps can affect the meter s accuracy. Schematic diagram of orifice plate the orifice flow meter consists of a 20mm bore tube with an orifice of 12mm. Inlet section a linear segment extending from the device and acts as an end connection for the fluid flowing inside. Orifice flange unions consist of two ansirated flanges usually weldneck, but slipon or threaded types are also available. The inlet diameter equals d 26 mm and the throat diameter d 16 mm. Differential pressure type flow meters head flow metersmeasure flow rate by introducing a constriction in the flow.
Pdf numerical methodology for orifice meter calibration. From 1924 to 1935, a significant amount of research and experimental work was conducted by the american gas association aga and the american society of mechanical engineers asme that resulted in the development of orifice meter coefficients and standards of construction for orifice meters. That is, pass a known volume through the meter and. The purpose of this experiment is to determine the value of k for a orifice. Flow through venturi meter background and theory introduction flow meters are used in the industry to measure the volumetric flow rate of fluids. It is mainly used for robust applications as it is known for its durability and is very economical. Experiment study on pressure drop of a multistage letdown orifice tube. As the name implies, it consists of an orifice plate which is the basic. The most commonly used inferential or rate meter is the thinplate, concentric orifice meter which is the primary device discussed in this paper. It continues to drop until the venacontracta is reached and then gradually increases until at approximately 5 to 8 diameters downstream a maximum pressure point is reached that will be lower than the pressure upstream of the orifice.
Pdf orifice meters are mechanical devices used to measure gases and liquids flows. Orifice meter fluid dynamics dynamics mechanics scribd. Application of orifice meter for accurate gas flow measurement techwpaper download as pdf file. If the orifice discharges free into the air, there is modular flow and the orifice is said to have free discharge. This also work on the same principle as that of venturimeter. Orifice meter the venturi meter described earlier is a reliable flow measuring device. It mainly consists of an orifice plate, an orifice plate housing, and a meter tube. Introduction there are many different meters used to measure fluid flow.
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