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List of products by author: M. H. Kwak
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Optimization of Tunnel Portal shape for Pressure variation and Micro-pressure wave reduction
Abstract: When a train enters a tunnel at high-speed, a micro-pressure wave generates at a tunnel exit and air pressure in a tunnel changes largely and rapidly. This paper shows optimization process of tunnel portals to reduce both a micro-pressure wave and large pressure variation simultaneously. Firstly, the length and the radius of a hood are considered as design variables and the aerodynamic...
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