Background

Post Doc
Department of Aeronautics and Astronautics, Stanford University (2001-2004)

Ph.D.
Department of Aeronautics and Astronautics, Stanford University (1995-2001)

Master of Science
Department of Aeronautics and Astronautics, Stanford University (1993-1995)

Sergeant
Korean Augmentation to the U.S. Army (1988-1991)

Bachelor of Science
Astronomy and Space Science Department, Kyunghee University (1985-1988,1991-1992)

Detail Resume Resume.pdf

Research Interests

• Multi-Component Integrated Simulations

The Multi-Component Integrated Simulation Project is a part of Department of Energy's Accelerated Strategic Computing Initiative (ASCI) project at Stanford. The goal of the Integrated Simulations is to couple several components of a gas-turbine engine into a single simulation that will eventally include the entire compressor, combustor, and turbine flow paths when the computing power becomes avaiable.

• Reduction of the Adjoint Gradient Formula in the Continuous Limit

A new continuous adjoint-based optimization method for Aerodynamic Shape Optimization (ASO) has been investigated. In the new method the volume integral part of the adjoint gradient forumla is reduced to a surface integral resulting in a reduction of the computational cost in calculating the gradients. The savings are particularly significant for three-dimensional ASO problems on general unstructured and overset meshes. (more...)

• Design Optimization of Multi-Element Aerodynamic Configurations

The adjoint-based optimization method, which has been used for the design of high-lift systems to validate the sensitivity calculation procedure, will be applied to more detailed and practical designs including multi-point design and three-dimensional design cases. (more...)

• Quiet Supersonic Platform Design

The motivation for our study of Quiet Supersonic Platform (QSP) Design is twofold. On the one hand, we would like to design aircraft configurations that can fly supersonically with substantially reduced sonic boom, while on the other hand, we would like to develop the necessary numerical optimization methods and tools for the design of low sonic boom aircraft. (more...)

• High-Lift System Design Using an Adjoint-Based Method

A viscous adjoint-based design method was used to demonstrate the feasibility of aerodynamic design of two-dimensional multi-element airfoils. The viscous design method used a Reynolds-Averaged Navier-Stokes (RANS) multi-block solver, FLO103-MB, a point-to-point matched multi-block grid system and the Message Passing Interface (MPI) communication standard for both the flow and adjoint calculations. The Spalart-Allmaras turbulence model was implemented to account for high Reynolds number effects. (more...)

• Adjoint Sensitivity Accuracy Study

Aerodynamic Shape Optimization (ASO) has long been a challenging problem in the study of fluid dynamics. A continuous adjoint method for ASO using the compressible Reynolds-Averaged Navier-Stokes (RANS) equations was implemented and tested. Using a viscous continuous adjoint formulation, the necessary aerodynamic gradient information was obtained with large computational savings over traditional finite-difference methods. The resulting implementation was used to determine the accuracy in the calculation of aerodynamic gradient information for use in ASO problems. (more...)

Publications

2005
			Schluter, J. U., Wu, X., Kim, S., Shankaran, S., Alonso, J. J., and Pitsch, H., "A Framework for Coupling reynolds-Averaged with Large Eddy Simulations for Gas Turbine Applications", Journal of Fluids Engineering, accepted, to appear 2005.
			Kim, S., Hosseini, K., Leoviriyakit, K., and Jameson, A."Enhancement of Adjoint Design Methods via Optimization of Adjoint Parameters", 43rd AIAA Aerospace Sciences Meeting & Exhibit, AIAA Paper 2005-0448, Reno, NV, January 10-13, 2005.
			Sriram, Gopinath, A., Van der Weide, E., Kim, S., Tomlin, C. and Jameson, A., "Aerodynamics and Flight Control of Insects: A Computational Study", 43rd Aerospace Sciences Meeting and Exhibit, AIAA Paper 2005-0841, Reno, Nevada, January 10-13 2005.
			Choi, S., Alonso, J.J., Kim, S., Kroo, I., and Wintzer, M., "Two-Level Multi-Fidelity Design Optimization Studies for Supersoniv Jets", 43rd Aerospace Sciences Meeting and Exhibit, AIAA Paper 2005-0531, Reno, Nevada, January 10-13 2005.
2004
			Kim, S., Alonso, J. J., and Jameson, A., "Multi-Element High-Lift Configurations Design Optimization Using Viscous Continuous Adjoint Method", Journal of Aircraft, vol. 41, no. 1.
			Jameson, A. and Kim, S., "Reduction of the Adjoint Gradient Formula for Aerodynamic Shape Optimization Problems", AIAA Journal, vol. 41, no. 11, pp. 2114-2129.
			Leoviriyakit, K., Kim, S., and Jameson, A., "Aero-Structural Wing Planform Optimization Using the Navier-Stokes Equations",10th AIAA/ISSMO Multidisciplany Analysis and Optimization Conference, AIAA Paper 2004-4479, Albany, New York, August 30 - September 1, 2004.
			Schluter, J. U., Wu, H., Kim, S., Alonso, J. J., and Pitsch, H., "Progress in Coupled LES-RANS Computations of Gas Turbines",5th International ASME/JSME Symposium on Computational Technology for Fluid/Themal/Chemical/Stressed Systmes with Industrial Applications, CA, La Jolla, July, 2004.
			Kim, S., Schluter, J. U., Wu, H., Alonso, J. J., and Pitsch, H., "Integrated Simulations for Multi-Component Analysis of Gas Turbines:RANS Boundary Conditions",40th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, AIAA Paper 2004-3415, Fort Lauderdale, CA, July, 2004.
			Schluter, J. U., Wu, H., Kim, S., Alonso, J. J., and Pitsch, H., "Coupled RANS-LES Computation of a Compressor and Combustor in a Gas Turbine",40thAIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, AIAA Paper 2004-3417, Fort Lauderdale, CA, July 2004.
			Schluter, J. U., Wu, H., Kim, S., Alonso, J. J., and Pitsch, H.,"Integrated RANS-LES Computations in Gas Turbines:Compressor-Diffuser",42nd AIAA Aerospace Sciences Metting and Exhibit, AIAA Paper 2004-0369, Reno, NV, January, 2004.
2003
			J. U. Schluter, S. Shankaran, S. Kim, H. Pitsch, J.J. Alonso and P.Moin, Towards Multi-Component Analysis of Gas Turbines by CFD:Integration of RANS and LES Flow Solvers, ASME TURBO EXPO 2003 Land, Sea and Air, GT2003-38350, Atlanta, June 2003.
			Leoviriyakit, K., Kim, S.,Jameson, A. Viscous Aerodynamic Shape Optimization of Wings including Planform Variables, 21st Applied Aerodynamics Conference, AIAA Paper 2003-3498, Orlando, Florida, June 2003.
			Jameson, A., Kim, S. Reduction of the Adjoint Gradient Formula in the Continuous Limit, 41st AIAA Aerospace Sciences Meeting & Exhibit, AIAA Paper 2003-0040, Reno, NV, January 2003.
			J. U. Schluter, S. Shankaran, S. Kim, H. Pitsch, J.J. Alonso and P.Moin Integration of RANS and LES Flow Solvers for Simultaneous Flow Computations, 41st AIAA Aerospace Sciences Meeting & Exhibit, AIAA Paper 2003-0040, Reno, NV, January 2003.
2002
			Nadarajah, S. K., Kim, S., Alonso, J.J., Jameson, A., Sonic Boom Reduction Using an Adjoint Method for Supersonic Transport Aircraft Configurations, IUTAM Symposium Transsonicum IV, Invited Paper, Goettingen, Germany, September 2002.
			Kim, S., Alonso, J.J., Jameson, A., Design Optimization of High-Lift Configurations Using a Viscous Continuous Adjoint Method, 40th AIAA Aerospace Sciences Meeting & Exhibit, AIAA Paper 2002-0844, Reno, NV, January 2002.
2001
			Kim, S., Design Optimization of High-Lift Configurations Using a Viscous Adjoint-Based Method, Ph.D. Dissertation, Stanford University, 3781-2001-K, December 2001.
2000
			Kim, S., Alonso, J.J., Jameson, A., Two-Dimensional High-Lift Aerodynamic Optimization Using the Continuous Adjoint Method, 8th AIAA/USAF/NASA/ISSMO Symposium on Multidisciplinary Analysi s and Optimization, AIAA Paper 2000-4741, Long Beach, CA, September 2000.
1999
			Kim, S., J. J. Alonso, Jameson, A., A Gradient Accuracy Study for the Adjoint-Based Navier-Stokes Design Method, 37th AIAA Aerospace Sciences Meeting & Exhibit, AIAA Paper 99-0299, Reno, NV, January 1999.