TSDL

Professor

- Hyeokbin Kwon
- Professor, Department of Transportation System Engineering,
  Graduate School of Transportation, Korea National University of Transportation
- AddressRM #313, BLDG of Graduate school of transportation (U6-313)
- Telephone031-460-0625
- E-mailhbkwon@ut.ac.kr
1. Education
- 1991.03 ~ 1995.02 B.S in Aerospace Engineering, Seoul National University
- 1995.03 ~ 1997.02 M.S in Aerospace Engineering, Seoul National University
- 1997.03 ~ 2001.08 Ph.D. in Aerospace Engineering, Seoul National University

2. Experience
- 2001.09 ~ 2013.09 Principal researcher, Korea Railroad Research Institute
- 2013.10 ~ present   Professor, Korea National University of Transportation

3. Award
- 2003.12.08 건설교통부장관 표창(제14393호)
- 2010.07.06 과학기술우수논문상(과총 제2010-94호)
- 2020.10.20 한국전산유체공학회 우수논문상(제20-08호)
- 2021.11.11 한국철도학회 우수논문상(제21-039호)

4. Research interest
- Railway Aerodynamics
- Future Transportation System Design
- Railway Safety

5. Publications

Ph. D. Dissertation
- Kwon, H. B. (2001). A Study on the Unsteady Compressible Flow Field Induced by a High-speed Train Passing through a Tunnel, Ph.D Dissertation, Seoul National University.

International Journal
[1] Kwon, H. B., Lee, D. H., & Baek, J. H. (2000). An experimental study of aerodynamic drag on high-speed train. KSME International Journal, 14(11), 1267-1275.

[2] Kwon, H. B., Jang, K. H., Kim, Y. S., Yee, K. J., & Lee, D. H. (2001). Nose shape optimization of high-speed train for minimization of tunnel sonic boom. JSME International Journal Series C Mechanical Systems, Machine Elements and Manufacturing, 44(3), 890-899.

[3] Kwon, H. B., Park, Y. W., Lee, D. H., & Kim, M. S. (2001). Wind tunnel experiments on Korean high-speed trains using various ground simulation techniques. Journal of Wind Engineering and Industrial Aerodynamics, 89(13), 1179-1195.

[4] Kwon, H. B., Kim, T. Y., Lee, D. H., & Kim, M. S. (2003). Numerical simulation of unsteady compressible flows induced by a high-speed train passing through a tunnel. Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 217(2), 111-124.

[5] Kim, S. W., Kwon, H. B., Kim, Y. G., & Park, T. W. (2006). Calculation of resistance to motion of a high-speed train using acceleration measurements in irregular coasting conditions. Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 220(4), 449-459.

[6] Kwon, H. B., Nam, S. W., & You, W. H. (2010). Wind Tunnel Testing on Crosswind Aerodynamic Forces Acting on Railway Vehicles. Journal of Fluid Science and Technology, 5(1), 56-63.

[7] Kim, T. K., Kim, K. H., & Kwon, H. B. (2011). Aerodynamic characteristics of a tube train. Journal of wind engineering and industrial aerodynamics, 99(12), 1187-1196.

[8] Lee, H. W., & Kwon, H. B. (2014). Analysis of the Effects of SD Plasma on Aerodynamic Drag Reduction of a High-speed Train. Journal of Electrical Engineering and Technology, 9(5), 1712-1718.

[9] Kang, H., Jin, Y., Kwon, H., & Kim, K. (2017). A Study on the Aerodynamic Drag of Transonic Vehicle in Evacuated Tube Using Computational Fluid Dynamics. International Journal of Aeronautical and Space Sciences, 18(4), 614-622.

[10] Kwon, H. (2018). A study on the resistance force and the aerodynamic drag of Korean high-speed trains. Vehicle System Dynamics, 56(8), 1250-1268.


International Conference
[1] Kwon, H. B., & Park, C. S. (2006, June). An experimental study on the relationship between ballast flying phenomenon and strong wind under high speed train. In Proceedings of the World Congress on Rail Research, Montreal, QC, Canada.

[2] Kwon, H. B., Lewe, J. H., Mavris, D. N., Lee, H. W., Jang, S. Y., Cho, W.Y. (2010). Conceptual Design of the Underground Tube Freight Transportation System, In Proceedings of 5th International Symposium on Underground Freight Transportation by Capsule Pipelines and Other Tube/Tunnel Systems, Shanghai, China.

[3] Kwon, H. B., & Oh, H. K. (2013). Decomposition and reduction of aerodynamic drag of high-speed train. In Proceedings of the WCRR.

[4] Jin, Y., Kang, H, & Kwon, H.,(2018, June). Numerical Analysis on the Aerodynamic Drag of High-speed Train, In Proceedings of World Transport Convention, Beijing, China.

[5] Kwon, H., & Kim, B. (2019). A Study on the Relationship between the Weather Condition and the Window Glass Damage by Accreted Snow under High-speed Trains. Proceedings of the International Workshops on Atmospheric Icing of Structures, Reykjavík, Iceland, 2006
- Junsun Ahn
- Assistant professor, Department of Railway Vehicle System Engineering,
  General Graduate School, Korea National University of Transportation
- AddressRM #103, Main Building (U1-103)
- Telephone031-460-0555
- E-mailjunsunahn@ut.ac.kr
1. Education
- 2006.03 ~ 2010.01 B.S in Department of Mechanical Engineering, KAIST, Daejeon, Korea
- 2010.02 ~ 2012.02   M.S in Department of Mechanical Engineering, KAIST, Daejeon, Korea
- 2012.03 ~ 2017.02   Ph.D. in Department of Mechanical Engineering, KAIST, Daejeon, Korea

2. Experience
- 2017.09 ~ 2019.08 Senior researcher, Agency for Defense Development, Korea
- 2013.10 ~ present     Assistant professor, Korea National University of Transportation

3. Award
- 2017.09.06 기계기술연구원장상

4. Research interest
- Railway Aerodynamics
- Future Transportation System Design
- Turbulence
- Flow Control


5. Publications

Ph. D. Dissertation
- Ahn, J. (2017). Large-scale motions in turbulent pipe flow, Ph.D Dissertation, KAIST.

International Journal
[1] Ahn, J., Lee J. H. & Sung, H. J. (2013). Statistics of the turbulent boundary layers over 3D cube-roughened walls. International Journal of Heat and Fluid Flow, 44, 394–402.

[2] Ahn, J. Lee, J. H., Jang, S. J. & Sung, H. J. (2013). Direct numerical simulations of fully developed turbulent pipe flows for Reτ = 180, 544 and 934. International Journal of Heat and Fluid Flow, 44, 222–228.

[3] Lee, J., Ahn, J. & Sung, H. J. (2015). Comparison of large- and very-large-scale motions in turbulent pipe and channel flows. Physics of Fluids, 27, 025101.

[4] Ahn, J., Lee, J. H., Lee, J., Kang, J. -H. & Sung, H. J. (2015). Direct numerical simulation of a 30R long turbulent pipe flow at Reτ = 3008. Physics of Fluids, 27, 065110.

[5] Yoon, M., Ahn, J., Hwang, J. & Sung, H. J. (2016). Contribution of velocity-vorticity correlations to the frictional Drag in wall-bounded turbulent flows. Physics of Fluids, 28, 081702.

[6] Kim, J. -S., Hwang, J., Yoon, M., Ahn, J. & Sung, H. J. (2017). Influence of a large-eddy breakup device on the frictional drag in a turbulent boundary layer. Physics of Fluids, 29, 065103.

[7] Ahn, J., Lee, J. & Sung, H. J. (2017). Contribution of large-scale motions to the Reynolds shear stress in turbulent pipe flows. International Journal of Heat and Fluid Flow, 66, 209–216.

[8] Ahn, J. & Sung, H. J. (2017). Relationship between streamwise and azimuthal length scales in a turbulent pipe flow. Physics of Fluids, 29, 105112.

[9] Choi, S., Ahn, J. & Koo, J. (2019). Statistical behavior of shear layers of reactive oxygen/kerosene spray. Acta Astronautica, 163, 157–167.

[10] Han, J., Hwang, J., Yoon, M., Ahn, J. & Sung, H. J. (2019). Azimuthal organization of large-scale motions in a turbulent minimal pipe flow. Physics of Fluids, 31, 055113.


International Conference
[1] Ahn, J., Lee, J. H. & Sung, H. J. (2011, November). Direct numerical simulation study in turbulent boundary layers with the cube-roughened Walls. 64th Annual Meeting of the APS Division of Fluid Dynamics, Baltimore, Maryland.

[2] Ahn, J., Lee, J. H. & Sung, H. J. (2012, November). Direct numerical simulations in turbulent boundary layers over cube-roughened walls with varying spanwise spacing. 65th Annual Meeting of the APS Division of Fluid Dynamics, San Diego, California.

[3] Ahn, J., Lee, J. H. & Sung, H. J. (2013, August). Inner-scaled turbulent statistics of turbulent pipe flows. 8th International Symposium on Turbulence and Shear Flow Phenomena, Poitiers, France.

[4] Ahn, J., Lee, J. H., Lee, J. & Sung, H. J. (2014, November). Large-scale motions for a high-Reynolds-number turbulent pipe flow at Reτ = 3008. 67th Annual Meeting of the APS Division of Fluid Dynamics, San Francisco, California.

[5] Ahn, J., Lee, J. H., Lee, J. & Sung, H. J. (2015, June). Wall scaling laws for a high-Reynolds number turbulent pipe flow at Reτ = 3008. 9th International Symposium on Turbulence and Shear Flow Phenomena, Melbourne, Australia.

[6] Ahn, J., Hwang, G., Lee, S., Kim, M. A. & Sung, H. J. (2015, November). Visualization of vortical structures in a turbulent pipe flow at Reτ = 3008. Gallery of Fluid Motion, 68th Annual Meeting of the APS Division of Fluid Dynamics, Boston, Massachusetts.

[7] Ahn, J. & Sung, H. J. (2015, November). Structural features of the kx−1 region of turbulent pipe at Reτ = 3008. 68th Annual Meeting of the APS Division of Fluid Dynamics, Boston, Massachusetts.

[8] Ahn, J. & Sung, H. J. (2016, November). Statistical growths of turbulent structures in a pipe flow. 69th Annual Meeting of the APS Division of Fluid Dynamics, Portland, Oregon.

[9] Yoon, M., Ahn, J., Hwang, J. & Sung, H. J. (2016, November). A relation between velocity-vorticity correlations and skin friction in wall-bounded turbulent flows. 69th Annual Meeting of the APS Division of Fluid Dynamics, Portland, Oregon.

[10] Lee, J., Ahn, J. & Sung, H. J. (2016, November). Five layers in a turbulent pipe flow. 69th Annual Meeting of the APS Division of Fluid Dynamics, Portland, Oregon.

[11] Kim, J. -S., Hwang, J., Yoon, M., Ahn, J. & Sung, H. J. (2016, November). Influence of large-eddy breakup device on near-wall turbulent structures in turbulent boundary layer. 69th Annual Meeting of the APS Division of Fluid Dynamics, Portland, Oregon.

Hyeokbin Kwon

Junsun Ahn