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http://dx.doi.org/10.6108/KSPE.2018.22.1.016

Specific Impulse Gain for KSLV-II with Combination of Dual Bell Nozzle and Expansion-Deflection Nozzle  

Moon, Taeseok (Department of Aerospace Engineering, Graduate School of Chungnam National University)
Huh, Hwanil (Department of Aerospace Engineering, Chungnam National University)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.22, no.1, 2018 , pp. 16-27 More about this Journal
Abstract
A basic numerical analysis was performed to confirm the possibility of combining a dual bell nozzle and an Expansion-Deflection(E-D) nozzle. The dual bell nozzle was designed based on the first-stage nozzle of the Korean Space Launch Vehicle that is being developed, and the E-D nozzle concept was applied to the dual bell nozzle. The inlet condition was analyzed by applying eight types of frozen flow analysis, and k-${\omega}$ SST was selected as the turbulence model. The number of optimal grids was obtained as 240,000 through the grid sensitivity analysis. As a result, it was confirmed that the transition altitude increased owing to over-expansion when the E-D nozzle concept was applied to the dual bell nozzle, and the specific impulse gain was obtained at high altitudes compared with the KSLV-II first-stage engine.
Keywords
Dual Bell Nozzle; Expansion-Deflection Nozzle; KSLV-II;
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Times Cited By KSCI : 5  (Citation Analysis)
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