National

Indigenous cryo engine successfully test-fired

By Our Staff Reporter

BANGALORE MARCH 30. The development of cryogenic upper stage for the Geo-synchronous Satellite Launch Vehicle (GSLV) crossed another milestone today with the successful test-firing of the indigenous cryogenic engine for a duration of 12 minutes.

A press release from the Indian Space Research Organisation (ISRO) here said that the test was carried out at the Liquid Propulsion Systems Centre (LPSC) Test complex at Mahendragiri in Tamil Nadu.

The achievement follows four shorter duration tests of 10, 40, 40, and 200 seconds carried out in the past few weeks.

The release said the turbo-pump fed regeneratively cooled engine, used for the test, produced a nominal thrust of seven tonnes in vacuum. The required facilities were established specifically to test the cryogenic engine consisting of feed systems for handling liquid oxygen and liquid hydrogen, instrumentation and data acquisition system with attendant safety devices. A number of chill-down trials and simulation tests were conducted before the actual hot firing of the engine. The cryogenic engine development has been a challenging task with breakthroughs needed with respect to many disciplines, including analytical tools, material characterisation, fabrication processes, test facility establishment, handling of cryogenic fluids, and finalisation of test sequence.

The press release added that the LPSC, the lead centre for the liquid propulsion systems, was responsible for the realisation of the engine and stage, fluid system, and associated test facilities.

The Vikram Sarabhai Space Centre, Thiruvananthapuram, was responsible for the development of pyrogen ignitors, pyrotechnic devices and analysis software. Indian industries had significantly contributed in the realisation of the cryogenic engine, it said.

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