Concept explainers
For the pipe flow into a reservoir of Example 8.5 consider the effect of pipe roughness on flow rate, assuming the pressure of the pump is maintained at 153 kPa. Plot the flow rate against pipe roughness ranging from smooth (e = 0) to very rough (e = 3.75 mm). Also consider the effect of pipe length assuming the pump always produces 153 kPa for smooth pipe. Plot the flow rate against pipe length for L= 100 m through L= 1000 m.
Want to see the full answer?
Check out a sample textbook solutionChapter 8 Solutions
Fox and McDonald's Introduction to Fluid Mechanics
Additional Engineering Textbook Solutions
Mechanics of Materials
Automotive Technology: Principles, Diagnosis, And Service (6th Edition) (halderman Automotive Series)
Applied Statics and Strength of Materials (6th Edition)
Introduction to Heat Transfer
Engineering Mechanics: Dynamics (14th Edition)
Engineering Mechanics: Statics
- 4. A venturi meter with a 10.16 cm throat is installed in a 15.24 cm pipe which is inclined upward at an angle of 45 degrees to the horizontal. If the distance between the pressure tape along the pipe is 1.5 m, the differential pressure is 70kPa, and the water temperature is 70°C, what is the discharge of water in m3/sec?. Assume coefficient of 0.985.arrow_forwardA Crude oil of specific gravity 0.81 and kinematic viscosity of 4.28 stoke is flowing through a pipe of diameter 460 mm at the rate of 4900 liters/sec. find the velocity, Reynolds Number & head lost due to friction for a length of 45 m of the pipe. Take the co-efficient of friction as 0.0058. Also find the Power required (in kW) to maintain the flow.arrow_forwardQ2\ A tank of water empties by gravity through a horizontal pipe into another tank. There is a sudden enlargement in the pipe as shown. At a certain time, the difference in levels is 3 m. Each pipe is 2 m long and has a friction coefficient 0.005. The inlet loss constant is K = 0.3. Calculate the volume flow rate at this point.arrow_forward
- Water at 25°C is pumped at 1800 gal/min from the lower to upper reservoir, as shown in Figure below (Zı = 30 ft and z2 = 180 ft). Pipe friction losses are approximated by hf = 35V/2g, where V is the average velocity in the pipe. The pump is 80% efficient. (a) Find the head loss due to friction, hẹ in ft. in horse power (b) Compute the pump head, h, in ft and the pump power needed, Ppump (hp). Given: Specific weight of water, ywater = 62.4 lb/ft'; 1 ft/s = 448.8 gal/min. Show all calculations. Z2 = 180 ft Z¡ = 30 ft D= 6 in Pumparrow_forwardAs shown in Fig. 4.33, the pipe diameter is d = 25 mm. l1 = 8 m; l2 = 1 m;H = 5 m. The nozzle diameter is d0 = 10 mm, and the minor loss coefficientsof inlet and elbow are f1 = 0.5 and f2 = 0.1 respectively. For nozzle, f3 =0.1 (relative to the outflow velocity of nozzle). The friction factor is k = 0:03.Try to determine jet height h.arrow_forwardA tanker carrying tolueneis unloaded to an onshore storage tank using the ship’s pumps. The pipeline is 225-mm inside diameter and 900-m long (200-m long suction line, 700-m long discharged line). Miscellaneous losses due to fittings, valves, etc., amount to 100 equivalent pipe diameters at the suction side, and 500 equivalent pipe diameters at the discharged side. The maximum liquid level in the destination storage tank is 30 m above the lowest liquid level in the ship’s tanks. The ship’s tanks are nitrogen blanketed and maintained at an absolute pressure of 1.05 bar (1 bar = 10^5 Pa). The storage tank has a floating roof, which exerts an absolute pressure of 1.1 bar on the liquid. The ship must unload 1000 metric tons within 5 hours. Taking pump efficiency as 70%, (ρ = 874 kg/m3, μ = 0.62 cP, Pvapor = 0.037 atm absolute). Determine: Discharge head (m) and pressure (Pa) Actual pump power (kW) Available NPSH (m)arrow_forward
- A tanker carrying tolueneis unloaded to an onshore storage tank using the ship’s pumps. The pipeline is 225-mm inside diameter and 900-m long (200-m long suction line, 700-m long discharged line). Miscellaneous losses due to fittings, valves, etc., amount to 100 equivalent pipe diameters at the suction side, and 500 equivalent pipe diameters at the discharged side. The maximum liquid level in the destination storage tank is 30 m above the lowest liquid level in the ship’s tanks. The ship’s tanks are nitrogen blanketed and maintained at an absolute pressure of 1.05 bar (1 bar = 10^5 Pa). The storage tank has a floating roof, which exerts an absolute pressure of 1.1 bar on the liquid. The ship must unload 1000 metric tons within 5 hours. Taking pump efficiency as 70%, (ρ = 874 kg/m3, μ = 0.62 cP, Pvapor = 0.037 atm absolute). Determine: D. Discharge head (m) and pressure (Pa) E. Actual pump power (kW) F. Available NPSH (m)arrow_forwardA tanker carrying tolueneis unloaded to an onshore storage tank using the ship’s pumps. The pipeline is 225-mm inside diameter and 900-m long (200-m long suction line, 700-m long discharged line). Miscellaneous losses due to fittings, valves, etc., amount to 100 equivalent pipe diameters at the suction side, and 500 equivalent pipe diameters at the discharged side. The maximum liquid level in the destination storage tank is 30 m above the lowest liquid level in the ship’s tanks. The ship’s tanks are nitrogen blanketed and maintained at an absolute pressure of 1.05 bar (1 bar = 105 Pa). The storage tank has a floating roof, which exerts an absolute pressure of 1.1 bar on the liquid. The ship must unload 1000 metric tons within 5 hours. Taking pump efficiency as 70%, (ρ = 874 kg/m3, μ = 0.62 cP, Pvapor = 0.037 atm absolute). Determine: A. Pump head (m) B. Pump differential pressure (Pa) C. Suction head (m) and pressure (Pa) D. Discharge head (m) and pressure (Pa) E. Actual pump power…arrow_forwardSAMPLE PROBLEMS #3 A venturi meter with a 10.16 cm throat is installed in a 15.24 cm pipe which is inclined upward at an angle of 45 degrees to the horizontal. If the distance between pressure tape along the pipe is 1.5 m, the differential pressure is 70 kPa, and the water temperature is 70°C, what is the discharge of water in m'/sec? Assume coefficient of 0.985.arrow_forward
- The ethanol solution is pumped into a vessel 25 m above the reference point through a 25 mm diameter steel pipe at a rate of 8 m3/hour. The length of the pipe is 35m and there are 2 elbows. Calculate the pump power requirement. The properties of the solution are density 975 kg/m3 and viscosity 4x 10-4 Pa s. a. Reynolds number = b. Energy Loss along a straight pipe = J/kg. c. Energy Loss in turns = J/kg. d. Total energy to overcome friction = J/kg. e. Energy to raise water to height = J/kg. f. Theoretical energy requirement of the pump kg ethanol/second = J/kg. g. Actual pump power requirement = watt.arrow_forward4. The flow rate of water through a commercial steel pipe with a diameter of 10 cm and roughness of 0.045 mm is 0.04 m³/s. Try to calculate the difference height H in water level between the two pools. The valve and the bend loss coefficients are 5.7 and 0.64, respectively. The inlet and outlet loss coeffi- cients are 0.5 and 1.0, respectively. Kinematic viscosity of water is 1-10-6 m²/s. Round off your answer to one decimal digit in m, but enter the answer without the unit. Water 20°C Valve 20m Bend 10m 20m commercial steel pipe diameter of 10cm Figure 1: Problem 4. Harrow_forwardEx. 2.11 A pump delivering 230 Ips of water whose absolute viscosity is 0.0114 Poise has a 300-mm diameter suction pipe and a 254-mm diameter discharge pipe as shown in the figure below. The suction pipe is 3.5 m long and the discharge pipe is 23 m long. The water is delivered 16 m above the intake water level. Considering the head losses in fittings and valves, find the head which the pump must supply. If the motor brake power of the driving motor is 75 kW, what is the efficiency of the pump? Assume the pipe material as cast iron. Given: A figure showing a pumping installation Q= 230 Ips D = 300 mm D = 254 mm H = 0.0114 Poise = 0.00114 Pa-s BP = 75 kW %3D %3D Standard elbow Standard elbow Discharge reservoir Long sweep elbow z=z, +2, Pump Source Foot valve & strainer Required: a) The total dynamic head b) The pump efficiency wilz,arrow_forward
- Elements Of ElectromagneticsMechanical EngineeringISBN:9780190698614Author:Sadiku, Matthew N. O.Publisher:Oxford University PressMechanics of Materials (10th Edition)Mechanical EngineeringISBN:9780134319650Author:Russell C. HibbelerPublisher:PEARSONThermodynamics: An Engineering ApproachMechanical EngineeringISBN:9781259822674Author:Yunus A. Cengel Dr., Michael A. BolesPublisher:McGraw-Hill Education
- Control Systems EngineeringMechanical EngineeringISBN:9781118170519Author:Norman S. NisePublisher:WILEYMechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage LearningEngineering Mechanics: StaticsMechanical EngineeringISBN:9781118807330Author:James L. Meriam, L. G. Kraige, J. N. BoltonPublisher:WILEY