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A Study on the Transitional Shock Separation Patterns in an Over-Expanded Nozzle  

Lee, Jong-Sung (안동대학교 대학원 기계공학과)
Lijo, Vincent (안동대학교 대학원 기계공학과)
Kim, Heuy-Dong (안동대학교 기계공학과)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.14, no.3, 2010 , pp. 9-15 More about this Journal
Abstract
Numerical investigation was carried out on axisymmetric over-expanded rocket nozzle to predict flow fields of transitional shock separation patterns. The unsteady, compressible N-S equations with k-$\omega$ SST for turbulence model closure were solved using a fully implicit finite volume scheme. Computed results were in good agreement with previous experimental works. It was found that strong side-loads were generated during the transition of RSS to FSS due to the development of a vortex ring in the inviscid jet core region. Hysteresis phenomenon exhibited by the shock-separation patterns was also found during the start-up and shut-down processes.
Keywords
Overexpansion Flow; FSS; RSS; Side-Load; Shock Wave; Rocket Nozzle;
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