25-07-2012, 11:36 AM
GEO SATELLITE LAUNCH VEHICLE
GEO SATELLITE LAUNCH.pptx (Size: 450.81 KB / Downloads: 65)
INTRODUCTION
A Geo Satellite Launch Vehicle is a vehicle by which we can place a satellite in space station.
Geo Satellite Launch Vehicle (GSLV) operates mainly in three stages, namely first stage, second stage & third stage (upper stage).
We employ these three stages in GSLV because here we have to work against earth gravity to place a satellite in space station, which is 22,300Miles from the earth surface.
The above three stages work one by one, when previous one will be complicated.
Generally GSLV used to place any type of satellite in space station.
TECHNICAL HISTORY
The Geosynchronous Satellite Launch Vehicle (GSLV) project was initiated in 1990 with the objective of acquiring launch capability for geo satellites. Until then, India depended on the former Soviet Union for the launch of heavy satellites.
Flight D1, launched on 18th April, 2001 from first launch pad of pay load GSAT 1 of mass 1540kg, which is successful.
Flight F02, lunched on 10th July ,2006 from second lunched pad of pay load INSAT 4C of mass 2168kg , which failed &the rocket and satellite had to be destroyed on Bay Of Bengal.
WORKING PRINCIPLE
First stage:-
The first stage is relatively simple. Besides the engine, the fuel, and the oxidizer tanks, a center body section lies between the fuel and the liquid oxygen tank. This center body section houses electronic equipment to implement commands from the second stage where the rocket's brains reside.
Once the spacecraft launches off the pad, the first stage engine needs more and more fuel to keep accelerating. A turbine-turbo pump pushes fuel and oxygen into the combustion chamber. Liquid oxygen is also used to keep the main engine and its nozzle from getting too hot and overheating.
Second stage:-
The second stage of the GSLV is powered by an Aerojet AJ10-118K engine, which burns a combination of Aerozine 50 (a 50/50 mix of hydrazine and dimethyl-hydrazine) and nitrogen tetroxide (N2O4) oxidizer. These fuels burn automatically when mixed, without a need for any lighters or igniters.
Stage II is restart able, and fires twice. The first burn occurs during the final portion of the boost phase and is used to insert the second and third stage spacecraft stack into a low Earth orbit. The second stage is programmed to shut itself off once the rocket and spacecraft are in orbit around Earth.
CONCLUSION
Recent researches are going on to minimize the high cost & to increase the % of success in launching.
Through GSLV project we can got some extra knowledge about property &behavior of earth. And also it can help us to study the property & behavior of space.