CRYOGENIC ENGINE

KARTHIK NAYAK

FAILURE OF MISSION GSLV-D3

GEO-SYNCHRONOUS SATELLITE LAUNCH VEHICLE

DATE : April 15, 2010

PLACE : Satish dhawan space centre Shar, Sriharikota.

SPECIALITY : It was the first satellite which was using INDIA developed cryogenic engine.

STATUS : Failure.

Why it failed…???

WHAT IS CRYOGENIC ENGINE…???

THE COOLEST HOTENGINE

Why Cryogenics…???

Propulsion system: The power Centre of a launcher.

Specific Impulse (Isp):

Index of efficiency of a propulsion system.Isp= Thrust / Weight flow rate of propellants. Traditionally expressed in seconds.

Ispof different propulsion systems (sea-level):

Solid propulsion –265 sEarth-storable liquid propulsion –285 sCryogenic propulsion –450 s

Operating Cycle - Gas Generator. Propellant Combination - LOX / LH2. Thrust Nominal (Vacuum) - 200 kN. Operating Thrust Range - 180 kN to 220 kN. Chamber Pressure (Nom) - 6 MPa. Engine Burn Duration (Nom) - 595 seconds. Total Flow rate - 462 kg/s. Nozzle Area ratio – 100. Mass - 588 kg.

SPECIFICATION

High Specific Impulse Non-toxic and non-corrosive propellants Non-hypergolic, improved ground safety

DEMERITS: Low density of liquid Hydrogen –more structural mass Low temperature of propellants -Complex storage & transfer systems and operations Hazards related to cryogens Overall cost of propellants relatively high Need for ignition system.

MERITS:

WHY WE NEED THIS…???BECAUSE, SATELLITE ARE BECOMING HEAVIER….

INSAT 1A [1982] –1150 kgINSAT 2A [1992] –1900 KgINSAT 3C [2002] –2750 KgINSAT 4A [2005] –3080 kg

NEXT MISSION OF ISRO WITH

THE COOLEST HOTENGINE

WE ALL HOPE IT WILL BE

A SUCCESSFUL LAUNCH BY INDIA

THANK YOU