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Catherine Frey Week 2: January 25 th , 2007

Catherine Frey Week 2: January 25 th , 2007. Propulsion Team Leader Liquid Propellant Tank Sizing. Liquid Propellant Masses. LOX/LH 2 vehicles carrying crew launching from Mars 5.00 O/F mixture ratio. Liquid Propellant Volumes. LOX 16x denser than LH 2.

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Catherine Frey Week 2: January 25 th , 2007

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  1. Catherine FreyWeek 2: January 25th, 2007 Propulsion Team Leader Liquid Propellant Tank Sizing

  2. Liquid Propellant Masses • LOX/LH2 • vehicles carrying crew • launching from Mars • 5.00 O/F mixture ratio

  3. Liquid Propellant Volumes • LOX 16x denser than LH2

  4. Liquid Propellant Mass Calculations • LOX density1: 1149 kg/m3 • LH2 density1: 70.9 kg/m3 • Optimum O/F ratio4: 6.00 • O/F ratio used3: 5.00 • LH2 mass calculated • mLH2=(mprop)(1+O/F) • LOX mass calculated • mLOX=(O/F)(mLH2)

  5. Liquid Propellant Volume Calculations • LOX density1: 1149 kg/m3 • LH2 density1: 70.9 kg/m3 • Optimum O/F ratio4: 6.00 • O/F ratio used3: 5.00 • LOX volume calculated • vLox = mLOX/ρLOX • LH2 volume calculated • vLH2 = mLH2/ρLH2

  6. All Liquid Propellant Vehicles

  7. All Liquid Propellant Vehicles

  8. References • 1Gordon, Sanford, and Bonnie J. McBride. Scientific and Technical Information Office. NASA. Computer Program for Calculation of Complex Chemical Equilibrium Compositions, Rocket Performance, Incident and Reflected Shocks, and Chapman-Jouget Detonations. Washington, D.C., 1971. • 2Landau, Damon F. Strategies for the Sustained Human Exploration of Mars. Diss. Purdue Univ., 2006. • 3Larson, Wiley J., and Linda K. Pranke, eds. Human Spaceflight: Mission Analysis and Design. The McGraw-Hill Companies, Inc. 783-784. • 4Wade, Mark. "LOX/LH2." Encyclopedia Astronautica. Astronautix. 23 Jan. 2007 <http:///www.astronautix.com/props/loxlh2.htm>.

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