![](http://uploads.cdn.yaclass.in/upload/pumpa/img_4.png)
PUMPA - SMART LEARNING
எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்
Book Free DemoA propellant is a chemical material that can be burned to create pressurised gases. The energy from these gases is used to propel a rocket against the gravitational force of attraction. A propellant is a mixture that contains a burning fuel and an oxidizer.
Oxidizer:
An oxidizer is a chemical needed for the fuel to burn or combust. It provides the oxygen needed for the fuel to burn or combust.
Example:
1. Oxygen
2. Ozone
Types of propellants:
The propellants may be liquid or solid in nature. There are three types of propellants.
1. Liquid propellants:
![Liquid_Hydrogen_pour.jpg](https://resources.cdn.yaclass.in/a56d2a96-eff4-4452-96f2-fb887d3c8693/LiquidHydrogenpourw300.jpg)
Fuel: Liquid hydrogen
![Nitric_acid_fuming.jpg](https://resources.cdn.yaclass.in/2c52b446-cdb7-4297-90e2-24f0a9d86db3/Nitricacidfumingw200.jpg)
Oxidizer: Fuming nitric acid
2. Solid propellants:
![BeFunky-collage.jpg](https://resources.cdn.yaclass.in/974ec432-9e52-4aca-88c2-de0604b09aff/BeFunkycollagew400.jpg)
Fuel: Polyurethane and polybutadiene
![Strontium_nitrate-substance.jpg](https://resources.cdn.yaclass.in/0d5a0101-abaa-4f40-80bf-919004a2a535/Strontiumnitratesubstancew300.jpg)
Oxidizer: Nitrate salts
3. Cryogenic propellants:
The fuel or oxidizer, or both, are liquefied gases contained at a very low temperature in these cryogenic propellants. There is no necessity for an ignition system as they react to the mixing and light their own flame.
![1.png](https://resources.cdn.yaclass.in/79d35934-d69c-4460-8dea-0dffb3a3f27d/1w400.png)
Cryogenic propellant
Reference:
https://upload.wikimedia.org/wikipedia/commons/0/00/Liquid_Hydrogen_pour.jpg
https://upload.wikimedia.org/wikipedia/commons/9/98/Nitric_acid_fuming.jpg
https://upload.wikimedia.org/wikipedia/commons/9/94/Strontium_nitrate-substance.jpg
https://upload.wikimedia.org/wikipedia/commons/d/d8/%C3%89ponge_type_4_%281%29.jpg