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مقالات فارسیISIکنفرانسهاژورنالها

Numerical Simulation of Flow around a High-Speed Train Subjected to Different Windbreak Walls and Yaw Angles

محل انتشار: دوماهنامه مکانیک سیالات کاربردی، دوره: 12، شماره: 4
سال انتشار: 1398
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 133

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لینک ثابت به این مقاله:
https://civilica.com/doc/1369659

شناسه ملی سند علمی:

JR_JAFM-12-4_013

تاریخ نمایه سازی: 15 دی 1400

چکیده مقاله:

The prediction of flow around a high-speed train subjected to different windbreak walls and yaw angles has been investigated using steady Shear Stress Transport (SST) k-ω turbulence model at the Reynolds number of ۱.۰×۱۰۶ based on the height of the scaled train model. The results show that an effective windbreak wall provide a favourable shielding effect for the train behind it, and force the primary positive pressure on the windward of the train to transfer on the wall. Consequently, the airflow cannot directly act on the train body, and the train is basically in an environment with small negative pressure. The inclined slope (the earth embankment type) windbreak wall shows poor anti-wind performance that should not be used along the new high-speed railways. When designing the windbreak wall, the influences of yaw angles should be taken into account.

کلیدواژه ها:

High ، speed train ، Yaw angle ، Windbreak wall ، Crosswind ، Numerical simulation

نویسندگان

J. Zhang

Key Laboratory of Traffic Safety on Track of Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha ۴۱۰۰۷۵, China

K. He

Key Laboratory of Traffic Safety on Track of Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha ۴۱۰۰۷۵, China

J. Wang

Key Laboratory of Traffic Safety on Track of Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha ۴۱۰۰۷۵, China

T. Liu

Joint International Research Laboratory of Key Technology for Rail Traffic Safety, Central South University, Changsha ۴۱۰۰۷۵, China

X. Liang

Joint International Research Laboratory of Key Technology for Rail Traffic Safety, Central South University, Changsha ۴۱۰۰۷۵, China

G. Gao

National & Local Joint Engineering Research Center of Safety Technology for Rail Vehicle, Changsha ۴۱۰۰۷۵, China