class14_dimensional_analysis

class14_dimensional_analysis - ES330, Section 2 Dr. Douglas...

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11/14/2007 1 ES330, Section 2 Dr. Douglas Bohl 239 Camp x6683, dbohl@clarkson.edu www.clarkson.edu/~dbohl/es330
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2 Outline • Topics – Scaling – Buckingham PI theorem • Example • Learning Objective – Be able to apply scaling arguments to determine relevant parameters of a physical problem. • Announcements – HW#7 Posted, due next Thursday – Exam#1 Corrections are due next Tuesday
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3 Boeing 7E7 Target Goal • Mid sized (210-250) passengers • Flight range: 8,000-8,500 miles • Made of 50% composite materials (wings, fuselage) • Use 20% less fuel over comparable planes
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4 Your Problem • We have a couple of proposed designs, how are we going to narrow them down so that we can proceed with the development?
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5 A Really Cool Facility NASA Ames 80ft x 120ft tunnel (world largest!)
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6 Cool facilities NASA Ames 80ft x 120ft tunnel (world largest!)
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Reality Check • The NASA Ames tunnel is hugely expensive to operate – Boeing anticipates over 1500 hours of windtunnel testing time on the 7E7
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class14_dimensional_analysis - ES330, Section 2 Dr. Douglas...

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