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AE 433 – Aerospace Propulsion
Daniel J. Bodony
Department of Aerospace Engineering
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
AE433 Fall 2015
Fundamental concept of propulsion
(Efficient) conversion of potential energy
into vehicle kinetic energy
AE433 Fall 2015
Possible potential energy sourcesHuman
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.
AE433 Fall 2015
Possible potential energy sources
Alphonse Pénaud’s Planaphore, 1871
strain energy
AE433 Fall 2015
Possible potential energy sources
SR-71
XCORMethane (l)
chemical (liquid)
AE433 Fall 2015
Possible potential energy sourceschemical
(solid)
AE433 Fall 2015
Other potential energy sources
• Electrical• Nuclear• Solar• Radio-isotope• …
SonexE-flight
Solar
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
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
AE433 Fall 2015
Two Propulsion Systems
Propeller-based Nozzle-based
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