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http://dx.doi.org/10.3795/KSME-B.2012.36.10.1001

Study on Cooling Characteristics of Mixed Gases with Hot Gas of Liquid Rocket Engine and Injected Liquid Nitrogen  

Jeon, Jun-Su (Dept. of Aerospace Engineering, Chungnam Nat'l Univ.)
Yu, I-Sang (Dept. of Aerospace Engineering, Chungnam Nat'l Univ.)
Kim, Joong-Il (Dept. of Aerospace Engineering, Chungnam Nat'l Univ.)
Kim, Jai-Ho (Dept. of Aerospace Engineering, Chungnam Nat'l Univ.)
Ko, Young-Sung (Dept. of Aerospace Engineering, Chungnam Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.36, no.10, 2012 , pp. 1001-1009 More about this Journal
Abstract
In this study, the cooling characteristics of combustion gas were investigated by injecting liquid nitrogen ($LN_2$) into a liquid rocket combustion chamber, which uses liquid oxygen (Lox) and kerosene as propellants. $LN_2$ injectors and an extended chamber for mixing were installed at the end of the ordinary LRE combustion chamber, and a nozzle was installed after the chamber for mixing. First, an ignition test of the liquid rocket engine was conducted to verify the stable combustion process. Next, a hot firing test was performed step-by-step for safety. Finally, the test was performed for 20 s. The results showed that the combustion gas of the LRE could be successfully cooled by using $LN_2$.
Keywords
Liquid Rocket Engine(LRE); LOx; $LN_2$; Kerosene;
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