Thinking Like an Engineer: An Active Learning Approach (4th Edition)
4th Edition
ISBN: 9780134639673
Author: Elizabeth A. Stephan, David R. Bowman, William J. Park, Benjamin L. Sill, Matthew W. Ohland
Publisher: PEARSON
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Textbook Question
Chapter 9, Problem 9ICA
It is proposed to create a set of dimensionless numbers used to describe the phenomena of reaching the escape velocity necessary to orbit the Earth. A set of names is proposed, based on famous astronauts:
- The Gagarin number, after Yuri Gagarin, a Russian astronaut and the first human to achieve escape velocity and orbit the Earth in outer space;
- The Valentina number, after Valentina Tereshkova, a Russian astronaut who was the first female to orbit the Earth;
- The Shepard number, after Alan Shepard, the first American to orbit the Earth; and
- The Ride number, after Sally Ride, the first American woman in space.
To begin the analysis, assume the following variables are important:
| g = Gravitational pull between planet and rocket | [=] meters per second squared [m/s2] |
| nr = Amount of rocket fuel | [=]moles [mol] |
| wp = Weight of planet | [=] pounds-force [lbf] |
| d = Diameter of planet | [=]miles [mi] |
| G = Newtonʼs gravitational constant | [=] newton meters squared per kilogram squared [N m2/kg2] |
| v = Velocity of rocket | [=] miles per hour [mph or mi/h] |
| η = Efficiency of the rocket engine | [=] unitless |
Determine a set of dimensionless groups using Rayleighʼs method.
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Chapter 9 Solutions
Thinking Like an Engineer: An Active Learning Approach (4th Edition)
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