Theory and Design for Mechanical Measurements
6th Edition
ISBN: 9781118881279
Author: Richard S. Figliola, Donald E. Beasley
Publisher: WILEY
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Chapter 10, Problem 10.36P
Estimate an uncertainty in the determined flow rate in Example 10.5, assuming that dimensions are known to within 0.025 mm, the systematic uncertainty in pressure is 0.25 cm H2O, and the pressure drop shows a standard deviation of 0.5 cm H2O in 31 readings. Upstream pressure is constant. State your reasonable assumptions.
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Air flows at 20 oC through a 6 cm pipe. A square edged orifice plate with the diameter ratio β=0.4 , is chosen to meter the flow rate. A pressure drop of 250 cm H2O is measured at the flange taps with an upstream pressure of 93.7 kPa absolute. Take discharge coefficient ,C, as 0.60±1%. Assume that dimensions are known to within 0.025 mm, the systematic uncertainty in pressure is 0.25 cm H2O, and the pressure drop shows a standard deviation of 0.5 cm H2O in 20 readings. Upstream pressure is constant. In the flow measurement , determine the followings :
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Moody chart
10
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0 025
:0.01
0.007
F0 001
0.0001
smooth
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Air with density of 1.225 kg/m^3 and viscosity of 1.789 x 10^-5 kg/m-s flows in a wind tunnel, the wind tunnel spped is measured with Pitot tube probe. For a certain run, the stagantion pressure is measured to be 472.6 Pa gage and the statric pressure is 15.43 Pa gage. Calculate the wind tunnel speed.
Chapter 10 Solutions
Theory and Design for Mechanical Measurements
Ch. 10 - Prob. 10.1PCh. 10 - A 20-cm-i.d. pipe through which 10 °C air flows is...Ch. 10 - What is the best estimate of the pipe flow rate...Ch. 10 - A mercury-filled (S = 13.57) manometer is used in...Ch. 10 - A capacitance pressure transducer is used to...Ch. 10 - Estimate the expansion factor in measuring the...Ch. 10 - The Reynolds number of a fluid flowing through a...Ch. 10 - At what flow rate of 20 °C water through a 10-cm-...Ch. 10 - Water (25 °C) flows through a square-edged orifice...Ch. 10 - An orifice plate is installed to meter air flow in...
Ch. 10 - Determine the flow rate of 38 °C air through a...Ch. 10 - A square-edged orifice (p = 0.5) is used to meter...Ch. 10 - Size a suitable orifice plate to meter the steady...Ch. 10 - An in-line flow nozzle is to be used to measure...Ch. 10 - A cast venturi meter is to be used to meter the...Ch. 10 - For 120 ft3/m of 60 °F water flowing through a...Ch. 10 - Estimate the flow rate of water through a...Ch. 10 - A 2-in. (50.8 ram) diameter orifice plate is...Ch. 10 - In order to measure the flow rate ina2mx2mair...Ch. 10 - A flow nozzle is to be used at choked conditions...Ch. 10 - Compute the flow rate of 20 °C air through a 0.5-m...Ch. 10 - An ASME long radius nozzle (P = 0.5) is to be used...Ch. 10 - A square-edged orifice plate is selected to meter...Ch. 10 - Estimate the error contribution to the uncertainty...Ch. 10 - For Problem 10.24, suppose the air flow rate is 17...Ch. 10 - An application uses water flowing at up to...Ch. 10 - Dry air at a static pressure and temperature of...Ch. 10 - Dry air at a stagnation pressure and temperature...Ch. 10 - A sonic nozzle can be used to regulate flow rate...Ch. 10 - Select an appropriate range for a differential...Ch. 10 - From a vendor catalog or online site, select a...Ch. 10 - A vortex flow meter uses a shcdder having a...Ch. 10 - A thermal mass flow meter is used to meter 30 °C...Ch. 10 - Research available thermal mass flow meters...Ch. 10 - Fuel oil used in large sea vessels is known as...Ch. 10 - Estimate an uncertainty in the determined flow...Ch. 10 - A thermal mass flow meter is used to meter air in...Ch. 10 - A vortex meter is to use a shedder having a...Ch. 10 - An engineer has an application of water at 20 °C...Ch. 10 - The flow of air is measured to be 30 m3/min at 50...Ch. 10 - A 6 in. x 4 in. i.d. cast venturi is used to...Ch. 10 - A simple method to measure volume flow rate is to...Ch. 10 - In the problem 10.42, suppose volume can be...
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