Abstract
An experimental system was developed for measuring pressure waves generated by a high-speed train. The system launches a 1/30 scale model of actual train shape and enables measurement with the geometric configurations same as actual situations. Compressed air is used for launching train models, and the air flow in the experimental system is mathematically modeled. This model allows us to determine optimum design parameters of the system for a target velocity and to control a launching velocity by adjusting the pressure of the compressed air. Measurement of the flow in the experimental system shows that the system performs as designed by the mathematical model and is capable of launching a train model at faster than 500 km/h. We measure pressure waves generated by a train moving into a tunnel, and the experimental data agrees well with field measurement data.
