Mechanical Engineering Science Thermodynamics and Fluid Mechanics

1
Real Flow Processes
Topic Areas Friction Chart Schematic Friction
Chart Example 4.5
Mechanical Engineering Science Thermodynamics and
Fluid Mechanics Slides Prepared by Dr. Alan
Leacock
2
Friction / Moody Chart Schematic
f
Laminar Flow
Turbulent Flow
Friction Value
Re
2000
2?106
Mechanical Engineering Science Thermodynamics and
Fluid Mechanics Slides Prepared by Dr. Alan
Leacock
3
Friction / Moody Chart
e/D
Mechanical Engineering Science Thermodynamics and
Fluid Mechanics Slides Prepared by Dr. Alan
Leacock
4
Example 4.5
Air with a density of 1.875 kg/m3 enters a pipe
of length 40 m. Estimate the minimum pipe
diameter, taking pipe friction into account, for
an entry rate of 0.6 m3/s if the maximum
allowable pressure drop over the pipe length is
25 kN/m2. Take m 2.107 ? 10-5 Ns/m2 and pipe
roughness e 0.1 mm. Assume incompressible flow
and use the standard friction factor chart.
Mechanical Engineering Science Thermodynamics and
Fluid Mechanics Slides Prepared by Dr. Alan
Leacock
5
Example 4.5
40 m
Ø d m
1
2
h1
h2
h1 h2
Mechanical Engineering Science Thermodynamics and
Fluid Mechanics Slides Prepared by Dr. Alan
Leacock
6
Example 4.5
Mechanical Engineering Science Thermodynamics and
Fluid Mechanics Slides Prepared by Dr. Alan
Leacock
7
Example 4.5
Mechanical Engineering Science Thermodynamics and
Fluid Mechanics Slides Prepared by Dr. Alan
Leacock
8
Example 4.5
Mechanical Engineering Science Thermodynamics and
Fluid Mechanics Slides Prepared by Dr. Alan
Leacock
9
Example 4.5
Mechanical Engineering Science Thermodynamics and
Fluid Mechanics Slides Prepared by Dr. Alan
Leacock
10
Example 4.5
Mechanical Engineering Science Thermodynamics and
Fluid Mechanics Slides Prepared by Dr. Alan
Leacock
11
Example 4.5
Mechanical Engineering Science Thermodynamics and
Fluid Mechanics Slides Prepared by Dr. Alan
Leacock
12
Example 4.5
Mechanical Engineering Science Thermodynamics and
Fluid Mechanics Slides Prepared by Dr. Alan
Leacock
13
Example 4.5
Mechanical Engineering Science Thermodynamics and
Fluid Mechanics Slides Prepared by Dr. Alan
Leacock
14
Example 4.5
Mechanical Engineering Science Thermodynamics and
Fluid Mechanics Slides Prepared by Dr. Alan
Leacock
15
Example 4.5
f 0.019
Mechanical Engineering Science Thermodynamics and
Fluid Mechanics Slides Prepared by Dr. Alan
Leacock
16
Example 4.5
Mechanical Engineering Science Thermodynamics and
Fluid Mechanics Slides Prepared by Dr. Alan
Leacock
17
Example 4.5
f 0.019
Mechanical Engineering Science Thermodynamics and
Fluid Mechanics Slides Prepared by Dr. Alan
Leacock
18
Example 4.5
Mechanical Engineering Science Thermodynamics and
Fluid Mechanics Slides Prepared by Dr. Alan
Leacock