EBK THINKING LIKE AN ENGINEER
4th Edition
ISBN: 8220103633512
Author: OHLAND
Publisher: PEARSON
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Chapter 16, Problem 18RQ
A cylindrical tank filled to a height of 25 feet with tribromoethylene has been pressurized to 3 atmospheres (Psurface = 3 atmospheres) The total pressure in at the bottom of the tank is 5 atmospheres. Write a MATLAB function that will determine the density of tribromoethylene in units of kilograms per cubic meter given the height in units of feet and the surface and total pressures in units of atmospheres.
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You are working as an engineer in a bearing systems design company. The flow of
lubricant inside a hydrodynamic bearing (p = 0.001 kg m-1 s-1) can be approximated
as a parallel, steady, two-dimensional, incompressible flow between two parallel plates.
The top plate, representing the moving part of the bearing, travels at a constant speed,
U, while the bottom plate remains stationary (Figure Q1). The plates are separated by
a distance of 2h = 1 cm and are W = 20 cm wide. Their length is L = 10 cm. By
applying the above approximations to the Navier-Stokes equations and assuming that
end effects can be neglected, the horizontal velocity profile can be shown to be
y = +h
I
2h = 1 cm
x1
y = -h
u(y)
1 dP
2μ dx
-y² + Ay + B
moving plate
stationary plate
U
2
I2
L = 10 cm
Figure Q1: Flow in a hydrodynamic bearing. The plates extend a width, W = 20 cm,
into the page.
Question 1
You are working as an engineer in a bearing systems design company. The flow of
lubricant inside a hydrodynamic bearing (µ = 0.001 kg m¯¹ s¯¹) can be approximated
as a parallel, steady, two-dimensional, incompressible flow between two parallel plates.
The top plate, representing the moving part of the bearing, travels at a constant speed,
U, while the bottom plate remains stationary (Figure Q1). The plates are separated by
a distance of 2h = 1 cm and are W = 20 cm wide. Their length is L = 10 cm. By
applying the above approximations to the Navier-Stokes equations and assuming that
end effects can be neglected, the horizontal velocity profile can be shown to be
1 dP
u(y)
=
2μ dx
-y² + Ay + B
y= +h
Ꮖ
2h=1 cm
1
x1
y = −h
moving plate
stationary plate
2
X2
L = 10 cm
Figure Q1: Flow in a hydrodynamic bearing. The plates extend a width, W = 20 cm,
into the page.
(a) By considering the appropriate boundary conditions, show that the constants take
the following forms:
U
U
1 dP
A =…
Question 2
You are an engineer working in the propulsion team for a supersonic civil transport
aircraft driven by a turbojet engine, where you have oversight of the design for the
engine intake and the exhaust nozzle, indicated in Figure Q2a. The turbojet engine can
operate when provided with air flow in the Mach number range, 0.60 to 0.80. You are
asked to analyse a condition where the aircraft is flying at 472 m/s at an altitude of
14,000 m. For all parts of the question, you can assume that the flow path of air through
the engine has a circular cross section.
(a)
← intake
normal
shock
472 m/s
A B
(b)
50 m/s
H
472 m/s
B
engine
altitude: 14,000 m
exhaust nozzle
E
F
exit to
atmosphere
diameter: DE = 0.30 m
E
F
diameter: DF = 0.66 m
Figure Q2: Propulsion system for a supersonic aircraft.
a) When the aircraft is at an altitude of 14,000 m, use the International Standard
Atmosphere in the Module Data Book to state the local air pressure and tempera-
ture. Thus show that the aircraft speed…
Chapter 16 Solutions
EBK THINKING LIKE AN ENGINEER
Ch. 16.1 - For the problem statement, list all knowns,...Ch. 16.1 - For the problem statement, list all knowns,...Ch. 16.1 - The total distance traveled from position zero by...Ch. 16.1 - The total distance traveled from position zero by...Ch. 16.2 - For the problem given in Comprehension Check 16-4,...Ch. 16.3 - What is the output when you pass in the value 10...Ch. 16.3 - Write a function named RAC that will accept two...Ch. 16.3 - For the problem given in Comprehension Check 16-4,...Ch. 16.4 - The total distance [mi] a jetliner cruising at a...Ch. 16.4 - The height of liquid in a large. bowl-shaped...
Ch. 16.4 - The height of water slowly draining from a large...Ch. 16 - Your instructor will provide you with a picture of...Ch. 16 - Describe the steps necessary to create a paper...Ch. 16 - Describe the steps necessary to create a jelly...Ch. 16 - Describe the steps necessary to cook your favorite...Ch. 16 - Describe the steps necessary to walk from your...Ch. 16 - An unmanned X-43A scramjet test vehicle has...Ch. 16 - Convert a temperature provided by the user in...Ch. 16 - Determine the mass of oxygen gas (formula: O2...Ch. 16 - Determine the length of one side of a cube of...Ch. 16 - Which of the following are not valid...Ch. 16 - Without running these code segments in MATLAB,...Ch. 16 - Prob. 12ICACh. 16 - Write a program to store the following matrices...Ch. 16 - Write a program to perform the following...Ch. 16 - Write a MATLAB program to evaluate the following...Ch. 16 - Write a MATLAB program to evaluate the following...Ch. 16 - Write a MATLAB program to evaluate the following...Ch. 16 - The Shockley diode equation gives the relationship...Ch. 16 - For each MATLAB code segment shown, write the...Ch. 16 - Prob. 20ICACh. 16 - A member of your team gives you the following...Ch. 16 - Prob. 22ICACh. 16 - Write a function named AddDiags that accepts two 3...Ch. 16 - Write a function named DiagCalcs that accepts two...Ch. 16 - The mass of several different lengths of the same...Ch. 16 - The rotational kinetic energy of a spinning object...Ch. 16 - Since the first exoplanet (a planet around a star...Ch. 16 - Consider the following MATLAB program and...Ch. 16 - A novice MATLAB user created the following code...Ch. 16 - Create an algorithm to determine the weight of a...Ch. 16 - The Eco-Marathon is an annual competition...Ch. 16 - Prob. 3RQCh. 16 - Prob. 4RQCh. 16 - The specific gravity of gold is 19.3. Write a...Ch. 16 - An unmanned X-43A scramjet test vehicle has...Ch. 16 - A rod on the surface of Jupiters moon Callisto has...Ch. 16 - The Eco-Marathon is an annual competition...Ch. 16 - Write a program to determine the mass of oxygen...Ch. 16 - Write a program to convert a temperature provided...Ch. 16 - Write a program to determine how long, in units of...Ch. 16 - A cylindrical tank filled to a height of 25 feet...Ch. 16 - Write a MATLAB program that implements the...Ch. 16 - Write a MATLAB program that implements the...Ch. 16 - The specific gravity of gold is 19.3. Write a...Ch. 16 - An unmanned X-43A scramjet test vehicle has...Ch. 16 - Prob. 17RQCh. 16 - A cylindrical tank filled to a height of 25 feet...Ch. 16 - Write a function that implements the quadratic...Ch. 16 - Write a function that implements the Pythagorean...Ch. 16 - As part of a team investigating the effect of mass...Ch. 16 - We have made many measurements of coffee cooling...Ch. 16 - In a factory, various metal pieces are forged and...Ch. 16 - Prob. 25RQCh. 16 - Prob. 26RQCh. 16 - Prob. 27RQCh. 16 - Prob. 28RQCh. 16 - Prob. 29RQCh. 16 - You have been assigned to a new project at work....Ch. 16 - You have been assigned to a new project at work....Ch. 16 - You have been assigned to a new project at work....
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