Measurement of Flow Characteristics of Meter and Control Valve

Added on - 16 Oct 2019

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Last Name1Name:Professor:Course:Date:MMDDYYYYMeasurement of Flow Characteristics of Meters and Control ValveIntroduction:Fluid flow is measured and controlled by obstructing the flow with suitabledevices or modification of the internal diameter profile. Five types of devices are studied inthis experiment. Orifice plate, with central hole in a blind flange; Nozzle, like orifice platebut the hole extended by a short pipe segment; Venturi tube, with converging and divergingbells; Pitot tube, involving thin L-shaped tube with adjustable radial position, and Iris valve,like adjustable diameter orifice plate; are studied using controlled delivery air blower. The airflow creates a pressure drop across the device. The flow rate and corresponding pressure dropare measured and plotted for the various devices.Aim:To study pressure drop characteristics of various air flow measuring and controllingdevices and verify theoretical equations.Experimental Procedure:1)The given device is bolted by flanges between two PVC pipe sections of 84.6mm NB.2)The necessary pressure tapping points are connected to manometer(s) by rubber tubes.3)The air blower connected to one pipe section is started and controlled at potentiometersettings of 2 to 8.4)The air velocity is measured with an anemometer.5)The resulting pressure drop is measured as difference in water columns of manometer.6)The water column pressure drop is converted to Pascal units and required plots aremade.Results:A)NozzleCharacteristicsPotentiometer∆h(mm)∆P (N/m2)sqrt(∆P) (N0.5/m)Velocity (m/s)2439.26.31.43878.58.92.1415147.212.12.8523225.615.03.5633323.718.04.2746451.321.25.0863618.024.96.0
Last Name2∆h = Manometer Reading, ∆P = Manometer reading converted to Pa or N/m2, Velocity is asmeasured by Anemometer.Orifice Plate Characteristics:Potentiometer Setting∆h(mm)∆P (N/m2)sqrt(∆P)(N0.5/m)Velocity(m/s)2439.26.31.23988.39.41.9416157.012.52.5523225.615.03.1635343.418.53.8748470.921.74.4864627.825.15.1B)Venturi Tube Characteristics:PotentiometerMeasuring PointId∆h(mm)∆P (N/m2)sqrt(∆P)(N0.5/m)Velocity (m/s)42212117.710.82.642327264.916.32.642413127.511.32.64251098.19.92.6426988.39.42.6522988.39.43.452334333.518.33.452420196.214.03.4525988.39.43.4526549.17.03.462214137.311.74.262350490.522.14.262430294.317.24.262515147.212.14.2626988.39.44.272219186.413.75.172374725.926.95.172440392.419.85.172518176.613.35.172611107.910.45.182227264.916.35.9823100981.031.35.982456549.423.45.982525245.315.75.982614137.311.75.9
Last Name3C)Pitot Tube Study of Velocity Profile:Potentiometer∆h(mm)∆P (N/m2)sqrt(∆P)(N0.5/m)VerticalDistance (mm)Velocity xConstant200.00.0-400.0219.83.1-203.1219.83.103.1219.83.1203.1200.00.0400.0319.83.1-403.13329.45.4-205.43329.45.405.43329.45.4205.4319.83.1403.14329.45.4-405.44768.78.3-208.34878.58.908.94878.58.9208.94439.26.3406.35439.26.3-406.351098.19.9-209.9512117.710.8010.8513127.511.32011.35658.97.7407.76878.58.9-408.9619186.413.7-2013.7620196.214.0014.0620196.214.02014.06768.78.3408.3713127.511.3-4011.3728274.716.6-2016.6733323.718.0018.0734333.518.32018.3715147.212.14012.1
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