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윤수환(Su-Hwan Yun),김태윤(Tae-yoon Kim),고태환(Tae-Hwan Ko),권혁빈(Hyeok-bin Kwon),이동호(Dong-ho Lee) 한국철도학회 2004 철도저널 Vol.7 No.3
Numerical analysis of aerodynamic characteristics was differently performed according to the running situation of the Korean Tilting Train express(TTX) that would be introduced for an improvement in efficiency of the used railroad track. Fluent 6.0 was used for the analysis of Non-tilting case, Tilting case and Passing-by case with the model of TTX. As a result, the aerodynamic drag had little difference between Tilting and Non-tilting case. However, pressure contour under the train of Tilting case was not symmetry because the gap between a train and the ground was different at both sides. In Passing-by case attraction and counter attraction occurred alternately and affected to the opposite train. When two trains were side by side, the maximum attraction was generated especially. Through an analysis of pressure wave in tunnel a large variation of pressure was generated by the bluff nose of TTX. The results in this study would be good data for the aerodynamic characteristic on TTX and provide important information to judgment of running safety.
윤수환(Su-Hwan Yun),김태윤(Tae-Yoon Kim),권혁빈(Hyeok-bin Kwon),이동호(Dong-Ho Lee) 한국철도학회 2004 한국철도학회 학술발표대회논문집 Vol.- No.-
Numerical analysis of aerodynamic characteristics was differently performed according to the running situation of the Korean Tilting Train eXpress(TTX) that would be introduced for an improvement in efficiency of the used railroad track. Fluent6.0 was used for the analysis of Non-tilting case, Tilting case and Passing-by case with the model of TTX. As a result, the aerodynamic drag had little difference between Tilting and Non-tilting case. However, pressure contour under the train of Tilting case was not symmetry because the gap between a train and the ground was different at both sides. And this disparity of pressure worked on the side force. In Passing-by case attraction and counterattraction occurred alternately and affected to the opposite train. When two trains were side by side, the maximum attraction was generated especially. Through an analysis of pressure wave in tunnel a large variation of pressure was generated by the bluff nose of TTX. The results in this study would be good data for the aerodynamic characteristic on TTX and provide important information to judgment of running safety.
황혁진 ( Hyuck-jin Hwang ),윤수환 ( Su-hwan Yoon ),홍태준,최승식 ( Seung-sik Choi ),박성만 ( Seong-man Park ) 한국정보처리학회 2016 한국정보처리학회 학술대회논문집 Vol.23 No.1
본 논문에서는 사물인터넷 기반의 홈/사무실을 구현하기 위해 사용자 등급, 사용자의 실내/외 구분을 통한 지능형 도어락을 소개한다. 도어락을 제어하기 위하여 오픈 소스 하드웨어인 ‘가상오브젝트 기반의 게이트웨이 라즈베리파이’와 ‘통합 컨트롤러 플랫폼 아두이노’를 이용하였으며 모바일 플랫폼으로는 안드로이드 스마트폰을 이용하였다. 본 지능형 도어락은 모바일 어플리케이션을 통해 문개/폐, 이력 조회, 실시간 영상 조회를 할 수 있으며, 사용자의 등급을 Owner(주인)와 Guest(손님)으로 나누어 도어락 제어의 제한을 두는 지능적인 도어락이다.
고속열차 하부 열차풍 감소를 위한 침목 형상 효과에 대한 연구
김종용(Jong-Yong Kim),김태윤(Tae-Yoon Kim),구요천(Yo-Cheon Ku),윤수환(Su-Hwan Yun),권혁빈(Hyeok-Bin Kwon),이동호(Dong-Ho Lee) 한국철도학회 2005 한국철도학회논문집 Vol.8 No.5
In this study, the relationship between tie shape and underbody train gust of high-speed train is numerically investigated. To this end, complex train underbody/railroad model is replaced by simple plate/tie model. And it is tried to find a most important parameter for reduction of underbody train gust through the Taguchi method and orthogonal array. As a result, it is verified that the height of tie is most sensitive to the underbody train gust because of the cavity effect between ties. When the width and distance between ties are decreased, underbody train gust is also reduced. Consequently, the heighter is examined which can give the similar effect of higher tie without replacement of tie. The 5cm heighter can reduce underbody train gust about 73%, which value is only 7% less than the higher tie.
무선 압력 측정 시스템을 이용한 고속차량의 풍압 특성 연구
남성원(Seong-Won Nam),이현수(Hyeon-Su Lee),권혁빈(Hyeok-Bin Kwon),윤수환(Su-Hwan Yoon) 한국철도학회 2012 한국철도학회 학술발표대회논문집 Vol.2012 No.5
고속 철도 차량이 터널을 통과할때의 압력 변동은 차량 탑승객들에게 이명감을 야기할 뿐만아니라 터널 출구에서의 미기압파의 생성 원인이 된다. 기존에는 이러한 차량 내외부의 압력 및 터널에서의 압력을 측정하기 위하여 센서와 계측 시스템간에 케이블을 사용하였다. 이러한 방법으로는 차량 외부의 센서를 연결하기 위하여 차량에 연결구를 만들어야 하므로 기밀유지에 저해가 되었으며, 터널의 길이가 길 경우에는 센서 설치에 한계가 있었다. 본 연구에서는 무선 압력 계측 시스템 개발을 통하여 기존의 이러한 단점과 제약 조건을 해소하였으며, 차량의 터널 통과시의 압력 특성을 잘 계측할 수 있었다. Pressure wave in high speec train tunnel causes ear-discomfort for passenger and micro-pressure wave for tunnel exit. To measure the pressure characteristics of external and internal pressure of train, cable-connected measuring system is used to transmit/receive signal. To do this, We have to make a hole or socket on carbody to connect external sensors to on board DAQ equipment. In a long size tunnel, it is almost impossible to set cable in tunnel. In this study, We have developed wireless pressure measuring system and measured the pressure characteristics in high speed train tunnel and had a good results compared with that of conventional measuring system.