3241 Lecture 1

# 3241 Lecture 1 - MAE 3241 AERODYNAMICS AND FLIGHT MECHANICS...

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MAE 3241: AERODYNAMICS AND FLIGHT MECHANICS Course Introduction and Overview January 10, 2011 Mechanical and Aerospace Engineering Department Florida Institute of Technology D. R. Kirk

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COURSE OVERVIEW Study of Aerodynamics (~70%) and Flight Mechanics (~30%) Analysis and design for aerospace applications 1. Basics Physics Mass, Momentum, Energy Manometers, Pitot Tube (air-speed measurement), Wind Tunnels Stream functions for simple and complex flows 1. Aerodynamics Lift, Drag, Moments , AR, S, C L , C D , C M Separation, Laminar and Turbulent Boundary Layers Airfoils Wings, Sweep, High Lift Devices Design: Low Speed vs. High Speed Flight Look at a wide range of aircraft and data 1. Flight Mechanics Aircraft performance: how fast, how high, how far? Level-flight, take-off, climb, landing, maneuvering Should be nothing short of one of best courses you take at Florida Tech
OBJECTIVES: WHY STUDY AERODYNAMICS? Determine forces and moments acting on flying vehicles Also for internal flows, such as airplane or rocket engines Calculate / predict: lift, drag, moments, heat transfer Understand how forces and moments are caused as a result of interaction between a body and surrounding air Understand how interaction depends on flow conditions Fluid properties Relative velocities Temperature, pressure, density Body geometry Use this understanding for design of aircraft What drives aerodynamics today?

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DESIGN DRIVER: FUEL ECONOMY Oil Service Holders (OIH) American Airlines (AMR)
FUEL COST DRIVEN EXAMPLE Engine washing cuts airline fuel costs, The Associated Press, June 11, 2008 “As airlines search for new ways to combat rising fuel costs, a growing number are finding that a nice hot bath can save millions of dollars”. 50 airlines have new program to wash their engines With fuel now the largest component of operating costs, carriers are turning to fuel-saving measures that once seemed hardly worthwhile. Since 2001, hundreds of jetliners world-wide have been outfitted with upswept wingtips that increase range and make them more aerodynamically efficient. Pilots routinely taxi to and from runway on one engine to save fuel and operate planes' auxiliary-power units as little as possible Fly slower Other cost saving measures: 1 st and 2 nd bag check fee (and many others new fees), water/coffee \$1, and remove all pillows from MD-80’s Polish vs. paint?

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CHEMICAL EMISSIONS
CHEMICAL EMISSIONS

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CHEMICAL EMISSIONS
NOISE

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NOISE
COMMERCIAL AIRCRAFT: BOEING SERIES 707 727 737 747 757 767 777 787

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BOEING 747-110 (1973) vs. 747-800 (2009)
VARIOUS NUMBER OF ENGINE CONFIGURATIONS 2 Engines 3 Engines 4 Engines 6 Engines

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DO YOU NEED WINGS TO FLY? "At some point I collided with one of the Skyhawks, at first I didn't realize it.
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3241 Lecture 1 - MAE 3241 AERODYNAMICS AND FLIGHT MECHANICS...

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