nimnataapi rocket engine

eyaraain 5 rocket mein laga valken engine.

bhoosthir upagrah prakshepan yaan mein prayukt hone waali drav indhan chaalit engine mein indhan bahut kam taapamaan par bhara jaata hai, isliye aise engine nimnataapi rocket engine ya tushaarajanik rocket engine (angreji:kraayojenik rocket injin) kahalaate hain. is tarah ke rocket engine mein atyadhik thandi aur draveekrut gaison ko indhan aur okseekaarak ke roop mein prayog kiya jaata hai. is engine mein haaidrojan aur indhan kramash: indhan aur okseekaarak ka kaarya karte hain. thos indhan ki apeksha yeh kai guna shaktishaali siddh hote hain aur rocket ko boost dete hain. visheshakar lambi doori aur bhaari rauketon ke liye yeh takaneek aavashyak hoti hai.^[1]

kraayojenik engine ke thrast mein taapamaan bahut ooncha (2000 degree celcius se adhik) hota hai. at: aise mein sarvaadhik praathamik kaarya atyant vipreet taapamaanon par engine vyavastha banaae rakhane ki kshamata arjit karna hota hai. kraayojenik injanon mein -253 degree celcius se lekar 2000 degree celcius tak ka utaar-chadhaav hota hai, isliye thrast chainbaron, tarbaainon aur indhan ke cylinderon ke liye kuchh vishesh prakaar ki mishr-dhaatu ki aavashyakta hoti hai. bhaarateeya antariksh anusandhaan sangathan (isaro) ne bahut kam taapamaan ko aasaani se jhel sakane waali mishradhaatu viksit kar li hai.

anya dravya pranodakon ki tulana mein kraayojenik dravya pranodakon ka prayog kathin hota hai. iski mukhya kathinaai yeh hai ki ye bahut jaldi vaashp ban jaate hain. inhein anya drav pranodakon ki tarah rocket khandon mein naheen bhara ja sakta. kraayojenik engine ke tarabaain aur panp jo indhan aur okseekaarak donon ko dahan kaksh mein pahunchaate hain, ko bhi khaas kism ke mishradhaatu se banaaya jaata hai.^[1] drav haaidrojan aur drav okseejan ko dahan kaksh tak pahunchaane mein jara si bhi galati hone par kai karod rupae ki laagat se bana jeeesaelavi rocket raaste mein jal sakta hai. iske alaava dahan ke poorv gaison (haaidrojan aur okseejan) ko sahi anupaat mein mishrit karna, sahi samay par dahan praarambh karna, unke dabaavon ko niyantrit karna, poore tantr ko garm hone se rokana aadi.

• nimnataapi indhan (kraayojenik fuel)
• tushaarajaniki (kraayojeniks)
• sankar rocket (haaibrid rocket)

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• bees varsh ki mehnat, kraayojenik mein safalta (BBC hindi)
• sau feesad khara utara desi kraayojanik engine (dainik jaagaran)