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http://dx.doi.org/10.6108/KSPE.2012.16.3.097

A Technical Trend of Manufacturing and Materials of Nozzle Extension for Thrust Chamber of Liquid Rocket  

Lee, Keum-Oh (한국항공우주연구원 연소기팀)
Ryu, Chul-Sung (한국항공우주연구원 연소기팀)
Choi, Hwan-Seok (한국항공우주연구원 연소기팀)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.16, no.3, 2012 , pp. 97-103 More about this Journal
Abstract
The combustion chamber and nozzle of a liquid rocket engine should be protected from the high temperature combustion gas generated by the chamber. An upper-stage nozzle extension has a large expansion ratio, therefore, The light-weight refractory materials have been used since the weight impact on the launcher performance is crucial. Gas film cooling method was used before, but was not applicable nowadays. Ablative cooling method and radiative cooling method with niobium alloy, Ni-based superalloy and ceramic based composite have been used to this day.
Keywords
Combustion Chamber; Nozzle Extension; Composite Materials; Niobium Alloy; Superalloy;
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