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Propulsion Booster Concepts and Sizing

Propulsion Booster Concepts and Sizing. Steven Golby. Presentation Outline. Subsystem Overview Requirements Descent Phase Current Propulsion Concepts Solid Rocket Bipropellant Liquid Rocket Comparison Future Work. Sub-System Overview. Cancel orbital velocity

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Propulsion Booster Concepts and Sizing

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  1. Propulsion Booster Concepts and Sizing Steven Golby

  2. Presentation Outline • Subsystem Overview • Requirements • Descent Phase • Current Propulsion Concepts • Solid Rocket • Bipropellant Liquid Rocket • Comparison • Future Work Steven Golby

  3. Sub-System Overview • Cancel orbital velocity • Obtain desired impact velocity • Detach from penetrator Steven Golby

  4. Requirements • Propulsion Sub-system shall: • Slow penetrator orbital velocity to ~ 0 m/s • Insure penetrator impact velocity of ~ 300 m/s • Detach from penetrator after satisfying velocity requirements • Not interfere with penetrator after separation Steven Golby

  5. Specific Impulse, Isp • Describes the efficiency of a rocket • Represents change in momentum per unit of propellant • Higher Isp→ more propellant efficient m =10 kg ∆V = 1 km/s Steven Golby

  6. Descent Phase Solid Rocket Liquid Rocket Steven Golby

  7. Solid Rocket • 2 stage solid rocket • 1st stage – cancel orbital velocity • 2nd stage – bring penetrator to desired impact velocity Steven Golby

  8. Solid Rocket Steven Golby

  9. Solid Rocket Sizing • Cylindrical canisters • First Stage Diameter = 20 cm Length = 26.5 cm • Second Stage Diameter = 12 cm Length = 14 cm Steven Golby

  10. Bipropellant Liquid Rocket • Hypergolic rocket • Fuel • Monomethylhydrazine (MMH) • Oxidizer • Dinitrogen Tetroxide (N2O4) Steven Golby

  11. Bipropellant Liquid Rocket Steven Golby

  12. Liquid Rocket Sizing • Spherical tanks • Oxidizer Tank Diameter = 23 cm • Fuel Tank Diameter = 21.5 cm Name

  13. Comparison Steven Golby

  14. Conclusions • Feasible from a propulsion perspective • Can tailor solid rocket grain • Existing bipropellant liquid rockets • 2 burns needed • Solid rocket: different stages Steven Golby

  15. Future Plans Steven Golby

  16. Questions?

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