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Measurement and Analysis for the Upper Side Flow Boundary Layer of a High Speed Train Using Wind Tunnel Experiments with a Scaled Model
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 Title & Authors
Measurement and Analysis for the Upper Side Flow Boundary Layer of a High Speed Train Using Wind Tunnel Experiments with a Scaled Model
Oh, Hyuck Keun; Kwon, Hyeok-bin; Kwak, Minho; Kim, Seogwon; Park, Choonsoo;
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 Abstract
The flows around a high speed train are very important because they could affect the aerodynamic characteristics such as drag and acoustic noise. Especially the boundary layer of flows could represent the characteristic of flows around the high speed train. Most previous studies have focused on the boundary layer region along the train length direction for the side of the train and underbody. The measurement and analysis of the boundary layer for the roof side is also very important because it could determine the flow inlet condition for the pantograph. In this study, the roof boundary layer was measured with a 1/20 scaled model of the next generation high speed train, and the results were compared with full-scaled computational fluid dynamics results to confirm their validity. As a result, it was confirmed that the flow inlet condition for the pantograph is about 85% of the train speed. Additionally, the characteristics of the boundary layer, which increases along the train direction, was also analyzed.
 Keywords
High Speed Train;Flow Boundary Layer;Wind tunnel test;Computational Fluid Dynamics;Scaled model;
 Language
Korean
 Cited by
1.
Design of large-scale streamlined head cars of high-speed trains and aerodynamic drag calculation, Archives of Transport, 2017, 44, 4, 89  crossref(new windwow)
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