Q- In a laboratory, a flow experiment is performed over a hydraulic structure. The measured values of discharge and velocity are 0.05 m3/s and 0.25 m/s, respectively. If the full-scale structure (30 times bigger) is subjected to a discharge of 270 m3/s, then the time scale (model to full scale (model to full scale) value (up to decimal places) is

Q- In a laboratory, a flow experiment is performed over a hydraulic structure. The measured values of discharge and velocity are 0.05 m3/s and 0.25 m/s, respectively. If the full-scale structure (30 times bigger) is subjected to a discharge of 270 m3/s, then the time scale (model to full scale (model to full scale) value (up to decimal places) is

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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A triangular pipe network is shown in the figure. Q=70 r=1 B Blur=2 Q=30 Q=100 A C The head loss in each pipe is given by h, = rQ¹.8, with the variables expressed in a consistent set of units. The value of r for the pipe AB is 1 and for the pipe BC is 2. If the discharge supplied at the point A (i.e., 100) is equally divided between the pipes AB and AC, the value of r (up to two decimal places) for the pipe AC should be
A triangular pipe network is shown in the figure. Q=100 r=1 8 B Q=70 r=2 Q= The head loss in each pipe is given b h;=rQ¹³ with the variables expressed in a consistent set of units. The value of r for the pipe AB is 1 and for the pipe BC is 2. If the discharge supplied at the point A (i.e., 100) is equally divided between the pipes AB and AC, the value of r (up to two decimal places) for the pipe AC should be
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Q3: Define the friction losses in pipes, what are the parameters that effect on friction in the pipe? Then consider a pump of 4 m head sucks water from a large tank. The pipe diameter is 10 cm and discharge water to atmosphere via a nozzle of 5 cm diameter as shown in Fig.2. The flow is turbulent and the friction factor is 0.015. Determine the water velocity inside the pipe and at the nozzle exit. 20 m 2 Elbow Nozzle 2 m 71 6 m FIG.2 Pump
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A pump system is used to move water at a flow rate of 30 L/s from a lower to a higher reservoir in a city with an elevation of 1000 m above sea level. The system is shown schematically in the figure below, with ∆?=30 m. Both the suction and delivery pipes have a diameter of 150 mm and an absolute roughness of 0.3 mm. The lengths of the suction and delivery pipes are 6 and 500 m respectively. Ignore local losses and assume a temperature of 15 °C. a)Develop a mathematical expression for the system curve (i.e. the pumping head required as a function of the system flow rate) from basic principles. Name all mechanics principles implemented. b)Calculate the required pump working point. What is the flow regime of the pipe flow. c)What power does the pump add to the water in the system?
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The diagram below shows a pumping system to pump water to an elevated tank. The next page shows the performance curve of a specific type of centrifugal pump. The loss factors at the inlet and outlet are 0.5 and 1.5 respectively while the loss factor associated with the bend is 1.5. The diameter of the pipe is 0.050 m while the total pipe length is 400 m. In order to simplify the calculation you can assume that the friction factor is f= 0.036. Determine the duty point of this pumping system and thus determine the flow rate of the pump for an impeller diameter of 140 mm? Also determine the shaft power of the pump and give an estimate of the pumps efficiency at the duty point. Given that the pump is located 1.80 m above the water surface (1), and the pipe length from inlet to pump is 6.0 m, determine the NPSHA at the pump and state whether cavitation is likely to occur. Sol: 3.6 m 40 H m 30- P 10 20- K₁ = 0.5 5- kW 2- 1- 13 4 2- NPSH K₁ = 1.5 170 160 150 140. 130_ (1) Q 10 Pump 20 54…
Two reservoirs are connected by two parallel pipes of equal length and of diameters 20 cm and 10 cm, as shown in the figure (not drawn to scale). When the difference in the water levels of the reservoirs is 5 m, the ratio of discharge in the larger diameter pipe to the discharge in the smaller diameter pipe is (Round off to two decimal places) (Consider only loss due to friction and neglect all other losses. Assume the friction factor to be the same for both the pipes) ! Reservoir 5 m 20 cm 10 cm ļ Reservoir