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http://dx.doi.org/10.5139/JKSAS.2010.39.3.232

LES for Turbulent Duct Flow with Surface Mass Injection  

Kim, Bo-Hoon (건국대학교 항공우주공학과 대학원)
Na, Yang (건국대학교 기계공학과)
Lee, Chang-Jin (건국대학교 항공우주공학과)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.39, no.3, 2011 , pp. 232-241 More about this Journal
Abstract
The hybrid rocket shows interesting characteristics of complicated mixing layer developed by the interaction between turbulent oxidizer flow and injected surface mass flow from fuel vaporization. In this study, the compressible LES was conducted to explore the physical phenomena of surface oscillatory flow induced by the flow interferences in a duct domain. From the numerical results, the wall injection generates the stronger streamwise vorticites and the negative components of axial velocity accompanied with the azimuthal vorticity near the surface. And the vortex shedding with a certain time scale was found to be developed by hydrodynamic instability in the mixing layer. The pressure fluctuations in this calculation exhibit a peculiar peak at a specific angular frequency($\omega$=8.8) representing intrinsic oscillation due to the injection.
Keywords
Hybrid Rocket; Large Eddy Simulation; Surface Mass Injection; Vortex Shedding; Intrinsic Oscillation; Hydrodynamic Instability;
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Times Cited By KSCI : 3  (Citation Analysis)
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