Applied Fluid Mechanics
7th Edition
ISBN: 9780133414622
Author: UNTENER
Publisher: YUZU
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Textbook Question
Chapter 15, Problem 14RQ
Of the venturi, the flow nozzle, the flow tube, and the orifice, which has the lowest discharge coefficient? Why?
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A submersible pump with a shaft power of 5 kW and an efficiency of 72 percent is used to pump water from a lake to a pool through a constant diameter pipe The free surface of the pool is 25 m above the free surface of the lake. If the irreversible head loss in the piping system is 4 m, determine the discharge rate of water and the pressure difference across the pump.
Chapter 15 Solutions
Applied Fluid Mechanics
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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- 14A fluid flows at a speed of 7.5 m/s in a pipe with a diameter of 35 cm. What is the power, in W, of the pump to overcome the irreversible pressure drop when the pressure drop along the pipe is calculated to be 6300 Pa?arrow_forwardIn climates with low night-time temperatures, an energy-efficient way of cooling a house is to install a fan in the ceiling that draws air from the interior of the house and discharges it to a ventilated attic space. Consider a house whose interior air volume is 720 m3 If air in the house is to be exchanged once every 20 minutes, determine (a) the required flow rate of the fan and (b) the average discharge speed of air if the fan diameter is 0.5 m..arrow_forwardIn terms of pumping performance, how would you determine the use of radial flow pumps and axial flow pumps?arrow_forward
- Which has a greater minor loss coefficient during pipe flow: gradual expansion or gradual contraction? Why?arrow_forwardWhat is the pressure drop in the turbine? Answer: 1176.91 kPa (replace “turbine pressure drop” for “pump pressure increase”)arrow_forwardFactors affecting the coefficient of discharge of circular orificearrow_forward
- compare how heat transfer(conduction and convection and radiation) efficiency will affect the lifetime of the turbine. Note: The effect of each type of heat transfer separately and accuratelyarrow_forwardIn a hydroelectric power plant, 100 m3/s of water flows from an elevation of 120 m to a turbine, where electric power is generated . The total irreversible head loss in the piping system from point 1 to point 2 (excluding the turbine unit) is determined to be 35 m. If the overall efficiency of the turbine–generator is 80 percent, estimate the electric power output.arrow_forwardThe mass flow rate of air at 20°C (? = 1.204 kg/m3) through a 18-cm-diameter duct is measured with a Venturi meter equipped with a water manometer. The Venturi neck has a diameter of 6 cm, and the manometer has a maximum differential height of 60 cm. Taking the discharge coefficient to be 0.98, determine the maximum mass flow rate of air this Venturi meter/manometer can measure.arrow_forward
- An axial-flow pump is designed to deliver water at a rate of 0.90 m3/s running at 620 rpm. Determine the available head, power, diameter and NPSH required for the pump at the maximum efficiency which is 75% . At maximum efficiency, the discharge coefficient, power coefficient, head coefficient and NPSH coefficient are given to be 0.048, 0.0012, 0.018 and 0.023 respectively. Take density of water to be 1000 kg/m3arrow_forwardA centrifugal pump is required to deliver 50 liters of water per second to a height or 30 m through a 100 m long pipe of 15 cm diameter. The inlet losses in the suction pipe are estimated to be 0.35 m. Assuming an overall efficiency of 70 percent and taking Darcy’s friction coefficient of 0.015 for the pipeline, determine the power, in kW, required to drive the pump.arrow_forwardExplain how flow rate is measured with a turbine flowmeter, and discuss how they compare to other types of flowmeters with respect to cost, head loss, and accuracy.arrow_forward
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