In this laboratory, we study high enthalpy flow and ground vehicle using computational fluid dynamics and wind tunnel test. In the field of high enthalpy flow, we study high temperature non-equilibrium flow in hypersonic flight environment, thermal protection system of hypersonic vehicle, plasma flow and flow control technique using it, and hot-gas behavior in high-voltage gas circuit breaker. In addition, various numerical methods are being developed to accurately and efficiently analyze complex flow fields. The field of ground vehicle is divided into the research on the aerodynamic shape design of high-speed trains and automobiles. In high-speed train, shape design and pantograph pan-head aerodynamic optimization are performed. In automobile, aerodynamic component design and shape optimization to enhance the aerodynamic performance are performed.