Hyeokbin Kwon

Surrogate-based multi-objective nose shape optimization for 400 km/h-class high-speed trains under open-air, crosswind, and tunnel operations

Abstract This study presents a surrogate-based multi-objective nose shape optimization for a 400 km/h-class high-speed train, considering normal open-air, crosswind open-air, and tunnel-related scenarios. The KTX-Cheongryong nose shape is parameterized using Bézier curves and a s...

Experimental and numerical analysis of aerodynamic drag reduction of high-speed train: impact of nose, bogie fairing and roof apparatus variations

Assessing aerodynamic modifications in high-speed trains requires quantifying drag reduction relative to previous designs and evaluating the improvement potential of an integrated configuration. This study investigated three-car configurations of the KTX-Cheongryong and HSEMU-370...