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Mahesh

06/04/23 06:40 AM IST

Dhawan-II engine

In News
  • Recently, a private space vehicle company Skyroot Aerospace test-fired its 3D-printed Dhawan II engine.
About Dhawan- II
  • It is a 3D-printed cryogenic engine developed by the Skyroot Aerospace for its heavier vehicle, the Vikram II rocket.
  • It uses a 3D-printed torch igniter and bellows actuated cryo-injection valve with a quick response time.
  • It utilises two high-performance rocket propellants, liquid natural gas (LNG) and liquid oxygen (LoX), which require cryogenic temperatures (below -150° Celsius) for storage and operation.
  • A cryogenic upper stage enhances the payload-carrying capacity of a rocket.
  • The cryogenic engine series is named in honour of Dr Satish Dhawan, an Indian rocket scientist.
3D Printing
  • 3D printing or additive manufacturing is a process of making three-dimensional solid objects from a digital file.
  • The creation of a 3D-printed object is achieved using additive processes.
  • In an additive process, an object is created by laying down successive layers of material until the object is created. Each of these layers can be seen as a thinly sliced cross-section of the object.
  • 3D printing enables you to produce complex shapes using less material than traditional manufacturing methods.
Cryogenic Engine
  • A cryogenic engine/ cryogenic stage is the last stage of space launch vehicles which makes use of Cryogenics.
  • Cryogenics - the study of the production and behaviour of materials at extremely low temperatures (below -150℃) to lift and place the heavier objects in space.
  • It uses Liquid Oxygen (LOx) and Liquid Hydrogen (LH2) as propellants.
  • They are one of the hardest to develop and so far only 6 countries have these launch vehicles - the US, China, Russia, France, Japan, and India.
Source- Indian Express

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