Space
CE20 Cryogenic Engine
- Context: The ‘Flight Acceptance Hot Test’ of the indigenously developed CE20 cryogenic engine was successfully completed at ISRO’s Propulsion Complex in Mahendragiri for the upcoming LVM3-M7 space mission.
About the CE20 Cryogenic Engine
- The CE20 is a powerful cryogenic rocket engine developed in India. It is used in the upper stage (C25/C32 stage) of the LVM3, India’s heaviest operational rocket.
- It utilizes liquid propellants at very low temperatures to generate the high thrust required to transport heavy satellites into Geosynchronous Transfer Orbit and to send spacecraft on deep-space missions.
About the CE20 Cryogenic Engine
- The CE20 is a powerful cryogenic rocket engine developed in India. It is used in the upper stage (C25/C32 stage) of the LVM3, India’s heaviest operational rocket.
- It utilizes liquid propellants at extremely low temperatures to generate the high thrust required to transport heavy satellites into Geosynchronous Transfer Orbit (GTO) and to send spacecraft on deep-space missions.
Development
- The CE20 engine was designed and developed by ISRO’s Liquid Propulsion Systems Centre (LPSC).
- It underwent testing and qualification at the ISRO Propulsion Complex (IPRC).
Background
- The CE20 was introduced as a more robust and reliable, fully indigenous replacement for the earlier CE-7.5 engine.
- It has successfully powered eight consecutive LVM3 missions, including Chandrayaan-2 and Chandrayaan-3.
Key Objective
- To provide a reliable indigenous cryogenic engine for launching:
- Heavy communication satellites
- Low Earth Orbit (LEO) satellite constellations
- Human spaceflight missions like Gaganyaan
Key Technical Features
Gas-Generator Cycle
- Utilizes a simple gas-generator cycle.
- Enhances engine reliability.
- Facilitates easier engine operation and superior control during flight.
Cryogenic Propellant System
- Uses liquid hydrogen as fuel and liquid oxygen as the oxidizer.
- Offers high efficiency in transporting heavy payloads into space.
Adjustable Thrust
- Generates thrust ranging from 19 to 22 tonnes.
- Enables the engine to perform optimally across various types of space missions.
Nozzle Protection System (NPS)
- Protects the engine nozzle during ground testing.
- Facilitates safe engine testing at sea level without the need for expensive vacuum test facilities.
Safety Features for Human Spaceflight
- Incorporates abort systems.
- Features enhanced structural safety margins.
- Continuously monitors the engine’s operational status.
- Meets safety requirements for the Gaganyaan human spaceflight mission.
Applications
LVM3 Upper Stage Engine
- Provides the final thrust to place heavy communication satellites into their intended orbits.
- Also supports deep-space missions.
Engine for Gaganyaan
- The human-rated CE20 engine powers the upper stage of the LVM3.
- Helps safely place Indian astronauts into Low Earth Orbit.
