Effective Specifications for the Cross-sectional Area of Tunnel Hoods for Reducing Micro-pressure Waves

Tunnel hoods are one of the countermeasures adopted for reducing micro-pressure waves emitted from high-speed railway tunnels. Experimental studies were conducted using axisymmetric models to investigate the effect of the cross-sectional area of hoods. The results show that the effective cross-sectional area of the hood with a uniform cross-section is...