• LES of transitional BL
• Base flow analysis
• LES/RANS base flow
• LES/RANS airfoil stall
• Pulse detonation engine
past major research
My research background is in numerical simulations of compressible turbulent and chemical reactive flows involving shocks, contact surfaces, material discontinuities, turbulence and their interactions.
LES of transitional boundary layer (2005-2006)Bypass transition was simulated by LES using a compact differencing scheme with spatial filtering. Reliability of compact/filter based compressible LES for the simulation of transitional flowfields and the sensitivities of simulation parameters were investigated.
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Analysis of high-speed base flows (2004-2005)Physics of cylindrical base flows ranging from subsonic to supersonic speeds at zero angle of attack were computationally investigated by using time-series and time-averaged analyses. The base flow mechanisms associated with the base pressure over a wide range of Mach numbers were focused.
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Supersonic base flow with LES/RANS hybrid methodology (2002-2004)LES/RANS hybrid methodology was applied to supersonic axisymmetric base flow, and both the reliability and efficiency of the hybrid methodology were investigated by comparing with the results obtained by LES, MILES and RANS and the experiments.
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supersonic base flowThin-airfoil stall phenomena with LES/RANS hybrid methodology (2002-2003)Analysis and prediction of thin-airfoil stall phenomena of NACA64A006 airfoil were numerically investigated using LES/RANS hybrid methodology with high-order compact differencing scheme. Thin-airfoil stalling aerodynamic characteristics were successfully predicted, and the mechanism of the formation of laminar small bubble near leading edge was clarified.
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numerical analysis of pulse detonation engine cycles (2000-2002)Two-dimensional numerical analysis of PDE cycles such as combustion, exhausting and fuel injection phases was performed with a simplified two-step chemical reaction model. Performance and characteristics of PDE and the possibility of the engine were shown.
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