Compute the resulting pressure in kPa after a "real" diffuser in which the energy loss due to sudden enlargement is considered for the flow of water at 25°C from a 36 mm OD x 2.0 mm wall copper tube to an 85 mm OD x 2.5 mm wall copper tube, the pipes are the same elevation. The volume flow rate is 150 L/min and the pressure before the enlargement is 505.823 kPa. NB: OD = Outside Diameter, Wall refers to the pipe's thickness (t) Hints: • Obtain the specific weight of water for the given temperature from Appendix A (Table A.1). • Obtain the resistance coefficient (K) for sudden enlargement from Table 10.3B in chapter 10. Instructions: Only express the areas in scientific notation to three decimal places but round off to three decimal places in normal number format where necessary throughout vour calculations leading to the final answer and including the final
Compute the resulting pressure in kPa after a "real" diffuser in which the energy loss due to sudden enlargement is considered for the flow of water at 25°C from a 36 mm OD x 2.0 mm wall copper tube to an 85 mm OD x 2.5 mm wall copper tube, the pipes are the same elevation. The volume flow rate is 150 L/min and the pressure before the enlargement is 505.823 kPa. NB: OD = Outside Diameter, Wall refers to the pipe's thickness (t) Hints: • Obtain the specific weight of water for the given temperature from Appendix A (Table A.1). • Obtain the resistance coefficient (K) for sudden enlargement from Table 10.3B in chapter 10. Instructions: Only express the areas in scientific notation to three decimal places but round off to three decimal places in normal number format where necessary throughout vour calculations leading to the final answer and including the final
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Compute the resulting pressure in kPa after a "real" diffuser in which the energy
loss due to sudden enlargement is considered for the flow of water at 25°C from a
36 mm OD x 2.0 mm wall copper tube to an 85 mm OD x 2.5 mm wall copper
tube, the pipes are the same elevation. The volume flow rate is 150 L/min and the
pressure before the enlargement is 505.823 kPa.
NB: OD = Outside Diameter, Wall refers to the pipe's thickness (t)
Hints:
• Obtain the specific weight of water for the given temperature from Appendix
A (Table A.1).
• Obtain the resistance coefficient (K) for sudden enlargement from Table
10.3B in chapter 10.
Instructions: Only express the areas in scientific notation to three decimal places
but round off to three decimal places in normal number format where necessary
throughout your calculations leading to the final answer and including the final
answer for all other computations excluding the area.

Transcribed Image Text:254 / 553
100%
TABLE 10.3B Resistance coefficient-sudden contraction-Metric data
Velocity v2, m/s
0.5
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
1.1
0.03
0.04
0.04
0.04
0.04
0.04
0.05
0.05
0.05
0.05
0.05
1.2
0.07
0.07
0.07
0.08
0.08
0.08
0.09
0.09
0.10
0.10
0.10
1.4
0.17
0.17
0.17
0.18
0.18
0.18
0.18
0.19
0.19
0.19
0.19
1.6
0.26
0.26
0.26
0.26
0.26
0.26
0.25
0.25
0.25
0.25
0.24
1.8
0.34
0.34
0.34
0.33
0.32
0.31
0.31
0.30
0.29
0.29
0.28
2.0
0.38
0.38
0.37
0.36
0.35
0.34
0.33
0.33
0.32
0.31
0.30
2.2
0.40
0.40
0.39
0.38
0.37
0.36
0.35
0.35
0.34
0.33
0.32
2.5
0.42
0.42
0.41
0.40
0.39
0.38
0.37
0.36
0.35
0.34
0.33
3.0
0.44
0.44
0.43
0.42
0.41
0.40
0.39
0.38
0.37
0.36
0.35
4.0
0.47
0.46
0.45
0.44
0.43
0.42
0.41
0.40
0.38
0.37
0.36
5.0
0.48
0.48
0.46
0.45
0.45
0.44
0.42
0.41
0.39
0.38
0.37
10.0
0.49
0.48
0.47
0.46
0.46
0.44
0.43
0.42
0.41
0.40
0.39
0.49
0.49
0.47
047
0.46
0.45
0.44
0.43
0.42
041
0.40
DDratio of diameter of larger pipe to diameter of smaller pipe; r-velocity in smaller pipe.
Source Brater. Emest F. Horace W King James E Lindel, and C Y. Wei 1996. Handbook of Hydraulics 7th ed. New York McGraw-Hill, Table 6-7
236
CHAPTER TEN Minor Losses
FIGURE 10.10 Gradual contraction.
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