Applied Fluid Mechanics (7th Edition)
7th Edition
ISBN: 9780132558921
Author: Robert L. Mott, Joseph A. Untener
Publisher: PEARSON
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Chapter 15, Problem 15.15PP
A pitot-static tube is inserted into a duct carrying air at standard atmospheric pressure and a temperature of
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. What horsepower is supplied to air moving at 7m/min through a 70cmx90cm duct under a pressure of8cm of H2O?
A pitot static tube fitted in a pipe of 0.25 m diameter records the difference in stagnation and static pressure as 0.085 m of water. Assume the velocity coefficient as unity, calculate the water velocity in the pipe line.
4. A special oil is to be used in an absorption tower. The preliminary design of the unit
requires the oil to be pumped from an open tank with a 10 ft liquid level above the floor and
forced through 150 ft of 3 inches schedule 40 pipe with a ball check valve and 5 elbows into
the top of a tower 30 ft above the floor. The operating pressure in the tower is to be 52 psig
and the oil requirement is estimated at 50 gpm. The viscosity of the oil 15 cP and its density
is 53.5 Ibm/ft. Assuming the pumping outfit operates with an overall efficiency of 60%, what
horsepower input will be required for the pump motor?
Chapter 15 Solutions
Applied Fluid Mechanics (7th Edition)
Ch. 15 - List six factors that affect the selection and use...Ch. 15 - Define range as it relates to flowmeters.Ch. 15 - Describe three methods for calibrating flowmeters.Ch. 15 - Prob. 4RQCh. 15 - Prob. 5RQCh. 15 - Prob. 6RQCh. 15 - Prob. 7RQCh. 15 - What is the nominal included angle of the...Ch. 15 - Why is there such a difference between the angles...Ch. 15 - Prob. 10RQ
Ch. 15 - Prob. 11RQCh. 15 - Describe an orifice meter and how it is used.Ch. 15 - Describe a flow tube and how it is used.Ch. 15 - Of the venturi, the flow nozzle, the flow tube,...Ch. 15 - Describe pressure loss as it relates to flowmetersCh. 15 - Rank the venturi, the flow nozzle, the orifice,...Ch. 15 - Prob. 17RQCh. 15 - Prob. 18RQCh. 15 - Prob. 19RQCh. 15 - Describe a magnetic flowmeter and how it is usedCh. 15 - Describe how mass flow irate can be measuredCh. 15 - Describe a pitot tube and how it is used.Ch. 15 - Prob. 23RQCh. 15 - Prob. 24RQCh. 15 - Prob. 25RQCh. 15 - Prob. 26RQCh. 15 - Describe the method used to measure the average...Ch. 15 - Prob. 28RQCh. 15 - Describe a hot-wire anemometer and how it is usedCh. 15 - Prob. 30RQCh. 15 - A venturi meter similar to the one in Fig. 15.2has...Ch. 15 - Air with a specific weight of 12.7N/m3 and a...Ch. 15 - Prob. 15.3PPCh. 15 - Prob. 15.4PPCh. 15 - Prob. 15.5PPCh. 15 - Prob. 15.6PPCh. 15 - Prob. 15.7PPCh. 15 - An orifice meter is to be used to measure the flow...Ch. 15 - A flow nozzle is to be installed in a 5-in Type K...Ch. 15 - An orifice meter is to be installed in a 12-in...Ch. 15 - A pitot-static tube is inserted into a pipe...Ch. 15 - A pitot-static tube is connected to a differential...Ch. 15 - A pitot-static tube is inserted in a pipe carrying...Ch. 15 - A pitot-static tube is inserted into a duct...Ch. 15 - A pitot-static tube is inserted into a duct...
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- Find the loss in total pressure for each run in the simple duct system of Fig. 1, using the equal-friction method and in English unit. The total pressure available for the duct system is 0.12 in. wg (30 Pa), and the loss in total pressure for each diffuser at the specified flow rate is 0.02 in. wg (5 Pa). Duct fittings are listed in Table 1. Assume the duct dimeter in run 1 is 10 in. and the rest are 8 in. Does the duct system require any adjustment? 150 cfm e. a 15 ft Plenum е 15 ft 5 ft 5 ft a 3. 20 ft 4 10 ft 200 cfm e 10 ft 150 cfm b Duct Fittings for Figure 1 Fittings Type Abrupt Entrance 90 deg Elbow, Pleated Round to Rectangular boot, Straight 45 deg. Converging Wye 45 deg Elbow, Pleated a d earrow_forwardThe flow rate through a control valve is 10 gpm. The area of the opening of the valve is 2 in^2 andthe pressure after the valve is 10 psi. What would be the approximate pressure reading at the gaugebefore the valve? Calculate the power loss across the valve?arrow_forwardA "spa tub" is to be designed to replace bath tubs in reno- vations. There are to be 6 outlet nozzles, each with a di- ameter of 12 mm, and each should have an outlet velocity of 12 m/s. What is the required flow rate from the single pump that supplies all of these nozzles? If there is one suction line leading to the pump, what is the minimum diameter to limit the velocity at the inlet of the pump to 2.5 m/s?arrow_forward
- A pitot tube records of 7.85 kN/m² as the stagnation pressure when it is head at the centre of pipe of 250 mm diameter conveying water. The static pressure in the pipe is 40 mm of mercury (gauge-vacuum). Calculate the discharge through the pipe assuming that the mean velocity of flow is 0.8 times the maximum velocity. Take C,= 0.98arrow_forwardSheet 1 Page 1 of 2 Q1/ An orifice meter is to be calibrated for the measurement of the flow rate of a stream of liquid acetone. The differential manometer fluid has a specific gravity of 1.10. The calibration is accomplished by connecting the orifice meter in series with a rotameter that has previously been calibrated for acetone, adjusting a valve to set the flow rate, and recording the flow rate (determined from the rotameter reading and the rotameter calibration curve) and the differential manometer reading, h. The procedure is repeated for several valve settings to generate an orifice meter calibration curve of flow rate versus h. The following data are taken. VALVEX Flow Rate V (mL/s) Manometer Reading h(mm) 62 10 87 15 107 20 123 138 25 30 151 1- For each of the given readings, calculate the pressure drop across the orifice, AP (mm Hg). 2- The flowrate through an orifice should be related to the pressure drop across the orifice by the formula. D = KPn Verify graphically that the…arrow_forwardThe pressure loss through the pipe and the minimum power required to overcome the resistance to flow.arrow_forward
- A manufacturer lists the flow coefficient for a certain control valve as 3.5 at a flow rate of 40 gal/min and a fluid Sg of 0.92 when the machine is at operating temperature. What would be the pressure drop across the valve?arrow_forwardA pitot static tube is used to measure the velocity of water in a pipeline. If the mercury manometer attached to it shows a reading of 0.17 m, calculate the water velocity in the pipe. Assume coefficient of velocity as 0.98.arrow_forwardPLease include a diagram.A Special oil is to be used in an absorption tower. The preliminary design of the unit requires the oil to be pumped from an open tank with a 10 ft liquid level above the floor and forced through 150 ft of 3 inches schedule 40 pipe with a ball check valve and 5 elbows into the top of a tower 30ft above the floor. The operating pressure in the tower is to be 52 psig and the oil requirement is estimated at 50gpm. The viscosity of the oil is 15cP and its density is 53.5 lbm/ft3. Assuming the pumping outfit operates with an overall efficiency of 60%, what horsepower input will be required for the pump motor?arrow_forward
- 5- Compare the reading of pitot tube and the reading of anemometer to the measurement of air velocity.arrow_forwardA perfect venture with throat diameter of 1.8 inches is placed horizontally in a pipe with a 5 in inside diameter. 80 lb of water flow through the pipe each second. What is the difference between the pipe and venture throat static pressure?arrow_forwardAt a flow rate of 30 LPM, what will happen if the pressure stays the same in 30, 60, and 90 seconds of 2.943 kPa? HYDROSTATIC PRESSUREarrow_forward
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