Engenharia

SOLUTION MANUAL
CHAPTER 6

Borgnakke and Sonntag

CONTENT
SUBSECTION
In-Text concept questions
Concept-Study guide problems
Continuity equation and flow rates
Single flow, single-device processes
Nozzles, diffusers
Throttle flow
Turbines, expanders
Compressors, fans
Heaters, coolers
Pumps, pipe and channel flows
Multiple flow, single-device processes
Turbines, compressors, expanders
Heat exchangers
Mixing processes
Multiple devices, cycle processes
Transient processes
Review Problems
Heat Transfer Problems

PROB NO. a-k 1- 10
11-19
20-30
21-39
40-47
48-57
58-67
68-75
76-82
83-92
93-101
102-110
111-127
128-141
142-145

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Borgnakke and Sonntag

In-Text Concept Questions

Excerpts from this work may be reproduced by instructors for distribution on a not-for-profit basis for testing or instructional purposes only to students enrolled in courses for which this textbook has been adopted. Any other reproduction or translation of this work beyond that permitted by Sections 107 or 108 of the 1976 United States Copyright Act without the permission of the copyright owner is unlawful.

Borgnakke and Sonntag

6.a
A mass flow rate into a control volume requires a normal velocity component.
Why?
The tangential velocity component does not bring any substance across the control volume surface as it flows parallel to it, the normal component of velocity brings substance in or out of the control volume according to its sign. The normal component must be into the control volume to bring mass in, just like when you