Efficient Ducted Fan Propulsion Design for Aircraft
Explore the rationale behind ducted fan usage, its performance considerations, components selection, and cost analysis. Learn about duct design, fuselage integration, and achieving optimal power.
Efficient Ducted Fan Propulsion Design for Aircraft
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Presentation Transcript
Propulsion PDR AAE451: Balsa to the Wall Team 2 Ashley Brawner Matt Negilski Neelam Datta Mike Palumbo Xing Huang Chris Selby Jesse Jones Tara Trafton
Presentation Overview • Why a Ducted Fan? • Pros • Cons • Performance Requirements • Thrust • Weight • Power • Ducted Fans • Electric Motors • Batteries • Duct Design • Fuselage Integration
Why a Ducted Fan? • Pros • No Propeller Tip Downwash • Direct Drive • Hand Launch / Belly Landing • Higher Static Thrust • Cons • Duct Profile Drag • Cost of Duct • Capable Motor • High RPM
Performance Requirements • Power Loading 3.0 • Weight Estimate 5.42lb • Power Required 1.8hp ** Preliminary Sizing
Electric Motor Data http://www.kontronik.com/index2e.htm
Electric Motor Data Cont’d http://www.kontronik.com/index2e.htm
Electric Motor Data Cont’d http://www.kontronik.com/index2e.htm
Motor Kontronik FUN 600–13 Kv = 1300 RPM/V Max Constant Current: 40 A Max # Cells: 30 Max Voltage: 36 V Battery 30 Cells NiMH @ 1.2V/cell Speed Controller Kontronik Jazz 55-10-32 Max Surge Current: 70 A Max # Cells: 32 Weight: 0.08 lbs Propulsion Summary
Propulsion Summary Cont’d • WeMoTec Midi Fan • Fan Dia: 3.5 in • Max RPM: 36,000 • Weight: 0.231 lbs • Performance • Power: 1.8 hp • Static Thrust: 4.86 lbf
Duct Design • Slightly Converging Inlet • 129% of Fan Swept Area • Funnel Air into Fan • Opposite of Turbo Jet • Straight Outlet • 99 % of FSA • Promote Flow • Opposite of Turbo Jet “Ducted Fan Design
Duct Design Cont’d • WeMoTec Midi Fan
Duct Design Cont’d • Duct Measurements ~1 in 2~3 in
Fuselage Integration • Duct Placement • Duct will be integrated on top of fuselage • Promote external boundary layer Ingestion • Less drag than mounting a nacelle • Room for payload below duct
Propulsion Cost Analysis • To Achieve Mission Requirements • Motor $ 150.00 • Batteries $ 90.00 • Ducted Fan $ 75.00 • Materials ~$ 50.00 • Sum $365.00
