Question

In: Mechanical Engineering

) A 50 mm-diameter propeller was installed in a 150 mm-diameter water pipe and the propeller...

) A 50 mm-diameter propeller was installed in a 150 mm-diameter water pipe and the propeller speed was measured for a range of water discharge in the pipe. The water had a density and dynamic viscosity of 1000 kg/m3 and 0.00112 Ns/m2 respectively. The measured results were as follows:

Q (litres/s): 12 28 45 63 95 120 160 180
N (rps): 5 10 15 20 30 40 60 80

Plot the dependence of propeller coefficient against propeller Reynolds number. A geometrically similar propeller with diameter 100 mm was installed in a 300 mm-diameter pipe conveying oil with density 800 kg/m3 and dynamic viscosity 0.007 Ns/m2 . Estimate the discharge in the oil pipe for measured propeller speeds of 40 rps and 90 rps.

Solutions

Expert Solution

Solution:

If you found this solution useful then please upvote


Related Solutions

Water flows through a cast iron pipe with a diameter of 30 mm. The pipe is...
Water flows through a cast iron pipe with a diameter of 30 mm. The pipe is inclined at an angle of 3 degrees from horizontal and is 40 m long. The water flows due to gravity only. What is the maximum volume flow rate of the water? You may ignore any minor loses.
A cast iron water pipe of 500 mm inside diameter and 20 mm thick, is supported...
A cast iron water pipe of 500 mm inside diameter and 20 mm thick, is supported over a span of 10 meters. Find the maximum bending stress in the pipe metal, when the pipe is running full. Take density of cast iron = 70.6 kN/m3 and water = 9.8 kN/m3
Air flows in a pipe with a diameter, D=50 mm. The inlet conditions are: M1 =...
Air flows in a pipe with a diameter, D=50 mm. The inlet conditions are: M1 = 3; total pressure, P01 = 1000 kPa absolute; and temperature, T1 = 550 K. The friction coefficient is, f = 0.004. The exit Mach number decreases with the length of the pipe. Plot the following while the exit Mach number to be changed from 2.5 to 0.99 with decrements of ?M=0.01: a) L, length of the pipe that is going to give the desired...
Consider a pipe (diameter of 50 mm) with air flowing through it. The inlet conditions are:...
Consider a pipe (diameter of 50 mm) with air flowing through it. The inlet conditions are: Mach 3; total pressure = 1000 kPa and 550 K. The friction coefficient (f) is 0.004. The exit Mach number decreases with the length of the pipe. Assume adiabatic, steady flow. Write a short Matlab code and plot the following, while the exit Mach number changes from 2.5 to 0.99 with increments of ?M=0.01. Find the length of the pipe that is going to...
A pipe, 900 m long and 200 mm in diameter discharges water to the atmosphere at...
A pipe, 900 m long and 200 mm in diameter discharges water to the atmosphere at a point 10 m below the inlet level. With an inlet pressure of 40 kPa gauge, the flow rate is 40 litres/sec. At a point half way between the pipe inlet and outlet, a new tapping is made from which water is taken at a rate of 18 litres/sec. To what value must the inlet pressure be raised in order to maintain the same...
Two water reservoirs are joined by a sharp ended flexible pipe 100 mm in diameter and...
Two water reservoirs are joined by a sharp ended flexible pipe 100 mm in diameter and 36 m long. The ends of the pipe differ in level by 4 m. The surface level of the upper reservoir is 1.8 m above the pipe inlet whilst that of the lower reservoir is 1.2 m above the pipe outlet. At a position 7.5 m horizontally from the upper reservoir, the pipe is required to pass over a barrier. Assuming that the pipe...
1200 cm3/sec of water at 420 K is pumped in a 40 mm internal diameter pipe...
1200 cm3/sec of water at 420 K is pumped in a 40 mm internal diameter pipe through a length of 150 m in a horizontal direction and up through a vertical length of 10 m . In the pipe there is a control valve which may be taken as equivalent to 200 pipe diameters and other pipe fittings equivalent to 60 pipe diameter. Also in the line there is a heat exchanger across which there is a loss in head...
A horizontal Venturimeter with inlet diameter 300 mm and throat diameter 150 mm is used to...
A horizontal Venturimeter with inlet diameter 300 mm and throat diameter 150 mm is used to measure the flow of water. The pressure at inlet is 24 N/cm2 and the vacuum pressure (p2)at the throat is 320 mm of mercury. Find the discharge and velocity through the pipe .The value of Cd may be taken as 0.98.
In a galvanised steel water supply line 100 m long and 50 mm in diameter, water...
In a galvanised steel water supply line 100 m long and 50 mm in diameter, water is pumped from a reservoir to a vented storage tank at an elevation 8 m above it. The following fittings are use: 1 hinged foot valve with strainer, 3 x 90? elbows, 2 gate calves (open), 20 screwed sockets, 1 sudden exit. The water viscosity is 1 x 10-6 m2/s and the density is 1000 kg/m3. (a) Calculate the friction factor at a flow...
A jet of water 50 mm in diameter with a velocity of 20 m/s strikes a...
A jet of water 50 mm in diameter with a velocity of 20 m/s strikes a flat plate inclined at an angle of 30° to the axis of the jet. Determine (i) the normal force exerted on the plate when the plate is stationary (ii) the normal force exerted on the plate when the plate is moving at 5 m/s in the direction of the jet (iii) the work-done on the plate and the efficiency for case (ii).
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT