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http://dx.doi.org/10.14481/jkges.2016.17.8.17

A Numerical Study on the Effect of Pressure Relief Ducts on the Normal Pressure in a Preliminary Design of Honam-Jeju Subsea Tunnel  

Seo, Sangyeon (GS E&C)
Ha, Heesang (GS E&C)
Publication Information
Journal of the Korean GEO-environmental Society / v.17, no.8, 2016 , pp. 17-27 More about this Journal
Abstract
High-speed trains have been developed widely in European countries and Japan in order to transport large quantity of people and commodities in short time. Additionally, a high speed train is one of the most desirable and environmentally friendly transportation methods. When a high speed train enters a tunnel, aerodynamic resistance is generated suddenly. This resistance causes micro pressure wave and discomfort to passengers. Due to this aerodynamic pressure against the train, a large amount of traction is required for the operation of a train in a tunnel. Therefore, it is essential to incorporate a pressure relief system in a tunnel in order to reduce aerodynamic resistance caused by a high-speed train. A pressure relief duct and a vertical shaft are representative measures in a tunnel. This study represents the effect of pressure relief ducts in order to alleviate positive and negative normal pressures acting on a train. One-dimensional numerical simulations were carried out in order to estimate the effect of pressure relief systems.
Keywords
High-speed train; Air pressure in a tunnel; One-dimensional numerical analysis; Pressure relief duct; Positive and negative pressure;
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