Jayme Zott Aerothermodynamics Coefficient of Drag

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Presentation transcript:

Jayme Zott 1-17-08 Aerothermodynamics Coefficient of Drag AAE 450 Spring 2008

Figure based on Ref: 1.Braeunig, 2.Filippone Overview Cd increases with M Impact of Cd decreases with altitude Shape has large impact on Cd Bullet shape more effective than cut-off airfoil shape Goal: Decrease Pressure and Base drag Figure based on Ref: 1.Braeunig, 2.Filippone 3.Hoerner AAE 450 Spring 2008 Aerothermodynamics

Suggestions Future Work For subsonic region: Cd = 0.55 For transonic region: Cd = 0.65 For supersonic region: Cd = 0.6 Future Work CFD to determine actual Cd Aerodynamic loads vary with altitude AAE 450 Spring 2008 Aerothermodynamics

References 1. Hoerner, Sighard F., Fluid-Dynamic Drag, 1958 2. Filippone, Antonio, “Advanced Topics in Aerodynamics: Aerodynamic Drag, Speed-related Drag”, Sept. 2006, [http://www.aerodyn.org/Drag/speed-drag.htm Accessed 1/16/08] 3. Braeunig, Robert A., “Rocket and Space Technology” June 2007 [http://www.braeunig.us/space/index_top/htm Accessed 1/15/08] 4. AAE 450 Senior Design Class: Spring 2006, “Project Infinity Final Report”, April 2006. 5. Tsohas, John, Droppers, Lloyd, J., and Heister, Stephen D.,”Sounding Rocket Technology Demonstration for Small Launch Behicle Project,” AIAA-RS4-2006-4004 AAE 450 Spring 2008

Cd Comparisons Vehicle Cd Hybrid Rocket (John Tsohas) 0.4 AAE 450 Spring 2006 launch vehicle AAE 450 Spring 2008