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권혁빈(Hyeok Bin Kwon),유원희(Won Hee You),조태환(Tae Hwan Cho) 대한기계학회 2011 大韓機械學會論文集A Vol.35 No.1
측풍 시 AREX 열차에 가해지는 공기역학적 하중을 측정하기 위하여 풍동시험이 수행되었다. 5%축소 시험 모델은 연결부, 하부 및 대차부 등을 포함하여 가능한한 자세하게 모델링되었다. 시험에 사용된 풍동은 폭 4m × 높이 3m 의 시험부를 가진 한국항공우주연구원(KARI)의 중형 아음속 풍동이다. 두 종류의 선로 모형에 놓여진 열차 모델에 가해지는 공기역학적 하중과 모멘트는 요각에 따라 도시되었으며, 실험 조건에 따른 공력 계수의 특성이 분석되었다. In this study, we measure the aerodynamic forces acting on an AREX train in a crosswind by wind tunnel testing. A detailed test model scaled to 5% of the original and including the inter-car, under-body, and the bogie systems was developed. The aerodynamic forces on the train vehicles have been measured in a 4 m × 3 m test section of the subsonic wind tunnel located in Korea Aerospace Research Institute (KARI). The aerodynamic forces and moments of the train model on two different track models have been plotted for various yaw angles, and the characteristics of the aerodynamic coefficients have been analyzed at the experimental conditions.
권혁빈(Hyeok Bin Kwon),유원희(Won Hee You) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.6
측풍 시 AREX 열차에 가해지는 공기역학적 하중을 측정하기 위하여 풍동시험이 수행되었다. 5% 축소 시험 모델은 연결부, 하부 및 대차부 등을 포함하여 가능한한 자세하게 모델링되었다. 시험에 사용된 풍동은 폭 4m × 높이 3m의 시험부를 가진 한국항공우주연구원(KARI)의 중형 아음속 풍동이다 두 종류의 선로 모형에 놓여진 열차 모델에 가해지는 공기역학적 하중과 모멘트는 요각에 따라 도시되었으며, 실험 조건에 따른 공력 계수의 특성이 분석되었다. This study is devoted to measure the aerodynamic forces acting on AREX train in crosswind using wind tunnel testing. 5 % scaled test model has been modeled as detailed as possible including the inter-car, under-body, and the bogie systems. The aerodynamic forces on each vehicle of the train have been measured in the 4m×3m test section of the subsonic wind tunnel located in Korea Aerospace Research Institute(KARI). The aerodynamic forces and moments of the train model on two different track model have been plotted with regard to various yaw angles and the characteristics of the aerodynamic coefficients have been analyzed relating to the experimental conditions.
An Experimental Study of Aerodynamic Drag on High-speed Train
Kwon, Hyeok-bin,Lee, Dong-ho-,Baek, Je-hyun The Korean Society of Mechanical Engineers 2000 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.14 No.11
A series do wind tunnel tests were conducted for Korean high-speed train model with various shape components to assess the contributions to aerodynamic drag. In order to elucidate the ground effects, two different wind tunnels, one with a moving ground system and the other with a fixed ground, were used for the same model and the results of both were compared and analyzed in detail. The result show that a suitable ground simulation is necessary for the test of a train model with many cars and detailed underbody. But the relative difference of the drag coefficients for the modifications of shape components can be measured by a fixed ground test with high accuracy and low cost. The effects of the nose shape, the inter-cargap and the bogie-fairing on total drag were discussed and some ideas were prosed to decrease the aerodynamic resistance of high speed train.