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

2. 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

3. 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

4. References 1. Hoerner, Sighard F., Fluid-Dynamic Drag, 1958
2. Filippone, Antonio, “Advanced Topics in Aerodynamics: Aerodynamic Drag, Speed-related Drag”, Sept. 2006, [ Accessed 1/16/08]
3. Braeunig, Robert A., “Rocket and Space Technology” June 2007 [ 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-RS
AAE 450 Spring 2008

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