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Rocket Types. EGR 4347 Analysis and Design of Propulsion Systems. Rocket Propulsion. Ideal Rocket Thrust Specific Impulse. Rocket Propulsion. Rocket Propulsion. Rocket Propulsion Elements – Sutton and Biblarz. Rocket Propulsion. Rocket Propulsion Elements – Sutton and Biblarz.

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Rocket Types

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Rocket Types

EGR 4347 Analysis and Design of Propulsion Systems


Rocket Propulsion

  • Ideal Rocket Thrust

  • Specific Impulse


RocketPropulsion


Rocket Propulsion

Rocket Propulsion Elements – Sutton and Biblarz


Rocket Propulsion

Rocket Propulsion Elements – Sutton and Biblarz


Rocket Propulsion


Chemical Rockets

  • Liquid – typical O2 and H2

  • Solid

Scientific American – March 2000


Liquid Rockets

Scientific American – March 2000


Solid Rockets

Scientific American – March 2000


Solid Rockets


Rocket Performance – Mars Mission

  • Thrust – force 1 N  ¼ lbf

  • ExhaustSpeed – Measure of fuel efficiency

  • Sample Burn Time – How long the rocket must fire to accelerate a 25-ton payload from low earth orbit to escape velocity. The time is inversely related to the thrust.

  • Sample fuel ratio – fraction of the total spacecraft mass taken up by propellant. The amount of fuel is exponentially related to the exhaust speed.

Scientific American – March 2000


Rocket Performance


Tested in 1960s

Hydrogen heated to 2,500 deg C

Reactors can generate electricity

Public opposition

Nuclear Rockets

Scientific American – March 2000


Rocket Performance


1950s

Electrical fields accelerate particles

Fuel – cesium or xenon

Cathode dumps electrons into flow at exit

Grids get in the way

ION

Scientific American – March 2000


ION

Rocket Propulsion Elements – Sutton and Biblarz


Rocket Performance


1970s Russia

Radial Magnetic Field

Xenon

No grids

Hall Effect

Scientific American – March 2000


Hall Effect

Rocket Propulsion Elements – Sutton and Biblarz


Rocket Performance


Magnetoplasmadynamic (MPD)

  • Magnetic acceleration

  • Magnetic field electrically generated

Scientific American – March 2000


Rocket Performance


Argon Fuel

Radial Magnetic Field

200 times a second

No electrodes

Pulsed Inductive Thruster (PIT)

Scientific American – March 2000


Rocket Performance


Variable Specific Impulse Magnetoplasma Rocket

Radio waves heat fuel

Ionized propellant (Hydrogen)

Magnetic fields

VASIMR

Scientific American – March 2000


VASIMR


Rocket Performance


Solar Sails

  • 9 N per square km

  • Large fragile structure

  • NASA working on Magnetic “sail” to catch sun particles

Scientific American – March 2000


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