ae 433 – aerospace propulsion daniel j. bodony department of aerospace engineering
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AE 433 – Aerospace Propulsion
Daniel J. Bodony
Department of Aerospace Engineering
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AE433 Fall 2015
Basic goals of this course
• Introduce a variety of aerospace-relevant propulsion systems– Propellers– Gas turbines (turbo{jet,fan,prop})– Higher performance systems ([sc]ramjet)
• Develop quantitative analysis tools for predicting performance
• Develop “rule-of-thumb” ideas and some intuition of orders-of-magnitude
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AE433 Fall 2015
Fundamental concept of propulsion
(Efficient) conversion of potential energy
into vehicle kinetic energy
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AE433 Fall 2015
Possible potential energy sourcesHuman
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AE433 Fall 2015
Possible potential energy sources
Alphonse Pénaud’s Planaphore, 1871
strain energy
strain energy(whale bone)
Reproductionof Launoy &Bienvenuehelicopter, 1784
Based onChinese designfrom A.D. 4-5.
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AE433 Fall 2015
Possible potential energy sources
Alphonse Pénaud’s Planaphore, 1871
strain energy
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AE433 Fall 2015
Possible potential energy sources
SR-71
XCORMethane (l)
chemical (liquid)
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AE433 Fall 2015
Possible potential energy sourceschemical
(solid)
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AE433 Fall 2015
Other potential energy sources
• Electrical• Nuclear• Solar• Radio-isotope• …
SonexE-flight
Solar
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AE433 Fall 2015
Commonalities
• Of the types of propulsion systems we just saw there were only three main methods of producing thrust– Rotating propellers– Ejection of fluid through nozzles– Ejection of high-speed particles (see AE 435)
• Our focus for this semester will be on the first two of these items, and on their integration
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AE433 Fall 2015
We Will Not Cover
• Chemical rockets – AE 434– liquid– solid– hybrid
• Electric propulsion – AE 435– ion thrusters– Hall thrusters– …
• Reciprocating engines – ME 403
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AE433 Fall 2015
Two Propulsion Systems
Propeller-based Nozzle-based
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AE433 Fall 2015
Discussion Outline
• Propeller-based propulsion– Geometry and design– Predictive theories (actuator {disc,line}; blade
element)• Axial turbine-based propulsion– Geometry and design– Component analysis (ideal and “real”)– Component integration and matching