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CFD Analysis on Base Region of Small Scaled 4 Nozzle Clustered Engine Configuration  

Kim, Seong-Lyong (한국항공우주연구원 발사체열공력팀)
Kim, In-Sun (한국항공우주연구원 발사체열공력팀)
Publication Information
Aerospace Engineering and Technology / v.11, no.1, 2012 , pp. 68-77 More about this Journal
Abstract
Flow characteristics of base region of small scaled 4 nozzle clustered engine has been analyzed with CFD approach along with the tests of numerical methods. The numerical test shows that Spalart-Allmaras turbulence model is appropriate for the present research. Plumes expanded from nozzles exits collide with each other and make high pressure stagnation region. Some of collided plumes expand again reversely into the base region with supersonic speeds. The reversed plume in the base region goes out to the outer region through the minimum vent area formed by the nearest nozzle exterior surfaces. But different from the empirical theory, the minimum vent area does not play a role of throat. Additionally the temperature of the nozzle inner surface strongly affects the temperature of the reversed plumes.
Keywords
4 nozzle clustered engine; KSLV-II; base heating;
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  • Reference
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