lecture_37

lecture_37 - Need better sliver control techniques Nuclear...

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16.512, Rocket Propulsion Prof. Manuel Martinez-Sanchez Lecture 37: Future Developments Some (dangerous) Forecasts on the Future of High Thrust Rockets (Chemical or Nuclear) Looking ahead in Rocketry Liquid Rockets : - No increase in I sp to be expected. - Gradual reliability increase through: o Better Health Monitoring , diagnostics, control, auto-reconfiguration o Added redundancy o Better materials, simplified designs - Shorter, less expensive design cycle by o Heavy use of computation o Active stability enforcement - Potential replacement of propellants Æ “green” propellants (H 2 O 2 + HC ? instead of Hydrazine + N 2 O 4 ) Solid Rockets : - Stronger, lighter casings - Active stability controls - Less expensive manufacturing - Basic combustion physics Æ “designer propellants” Hybrid Rockets : Potential to replace solids (similar I sp , re-start, control, safety)
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Unformatted text preview: Need better sliver control techniques Nuclear Rockets : Needed for interplanetary flight. Political issue. Phoebus 2A, 12 min (1968) 119 Kg/s, H 2 P th = 4 GW, 2280 K, 47 atm, 9500 Kg mass F 10 w ± F ± 119 x 8000 ≈ 10 6 N 100 Ton ± 16.512, Rocket Propulsion Lecture 37 Prof. Manuel Martinez-Sanchez Page 1 of 2 Open cycle, cannot (should not) operate from ground. Can be launched chemically to orbit (inactive), then be used as upper stage. Shielding only “shadow”, will require large exclusion zone about vehicle ( 10 Km, except in protected cone) ∼ New design by Carlo Rubbia claims scalability to small size. A thin films surrounding H 2 channels, says can build critical engine for 30 KW H. 16.512, Rocket Propulsion Lecture 37 Prof. Manuel Martinez-Sanchez Page 2 of 2...
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This note was uploaded on 11/07/2011 for the course AERO 16.512 taught by Professor Manuelmartinez-sanchez during the Fall '05 term at MIT.

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lecture_37 - Need better sliver control techniques Nuclear...

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