DEPARTMENT OF AERONAUTICAL ENGINEERING

ELECTRIC ROCKET PROPULSION

• Prepared byGroup E

Principle Of Rocket• Newton's Third Law

The System Which Is Used Launch The Satellite In The Earth Orbit Is Known As Rockets.

Introduction Of Electric Rocket Propulsion

• An electrically powered rocket propulsion system uses electrical energy to change the velocity of a rocket.

• It uses the electrical energy like batteries, electric current and nuclear power for ignition and for thrust required.

Introduction• Due to limited electric

power the thrust is much weaker compared to chemical rockets, but electric propulsion can provide a small thrust for a long time. Russian satellites have used electric propulsion for decade.

Electric Rocket Propulsion

• The idea of electric propulsion for spacecraft dates back to 1906.

• The first in-space demonstration of electric propulsion was an ion engine carried on board the SERT-1 (Space Electric Rocket Test) spacecraft, launched on 20 July 1964

Types of electric propulsion

• Ion/plasma drives• Electrostatic• Electro thermal• Electromagnetic

Ion/plasma drives

• This type of rocket-like reaction engine uses electric energy to obtain thrust from propellant carried with the vehicle.

Electrostatic

• If the acceleration is caused mainly by the Coulomb force

• It uses electrostatic principle

Electro Thermal• where

electromagnetic fields are used to generate a plasma to increase the temperature of the bulk propellant.

Electro Thermal

• The propellant is heated by electrically with the help of heat resistors and electric arcs

• The thermal energy imparted to the propellant gas is then converted into kinetic energy by a nozzle of either solid material or magnetic fields.

Electromagnetic

• If ions are accelerated either by the Lorentz force or by the effect of an electromagnetic fields where the electric field is not in the direction of the acceleration, the device is considered electromagnetic.

Electric Propulsion AcceleratorsElectro thermal

Electrostatic Electromagnetic

Acceleration force

Electrically heat propellant and use nozzle expansion

Magnetic and electric fields accelerate charged particles

Static electric field alone accelerates charged particles

Isp(s) 300-1500 1000-10000 2000-100000+

Thrust/weight <1/1000 <1/10000 <1/100000

Applications

• Used as launch vehicle• Used in space crafts• Used in missile and other application such as

vernier rockets, spin rockets, signal rockets etc.…

ANY QUERIES ?

THANK YOU

–BY Group E