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Journal of Applied Fluid Mechanics، جلد ۱۳، شماره ۲، صفحات ۴۵۷-۴۶۸
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عنوان انگلیسی Improved Delayed Detached Eddy Simulation of the Slipstream and Trackside Pressure of Trains with Different Horizontal Profiles
چکیده انگلیسی مقاله The slipstream caused by high-speed trains may harm pedestrians and workers trackside. In general, the characteristics of the slipstream are influenced mainly by the nose shape of the train. The present study explores the slipstream caused by high-speed trains with three different horizontal nose profiles based on the results of three-dimensional, improved delayed detached eddy simulation (IDDES) with an unsteady turbulence model and a set of 1/8th scaled train models. The results obtained using this numerical methodology are in good agreement with those obtained from corresponding wind tunnel tests. The trackside pressure changes around the train models are also captured and analyzed. The analysis reveals that the width of the nose can significantly influence the magnitude and arrival time of slipstream velocity and pressure peaks. The results and proposed numerical methodology can be used as guidelines for the design of high-speed train nose shapes.
کلیدواژه‌های انگلیسی مقاله High, Improved delayed detached eddy simulation (IDDES), speed train, Slipstream, Nose shape, Trackside pressure
نویسندگان مقاله B. Liu |
P&T Research Center, CRRC Tangshan Co., Ltd., Tangshan 063035, China

B. Liu |
P&T Research Center, CRRC Tangshan Co., Ltd., Tangshan 063035, China

T. H. Liu |
Key Laboratory of Traffic Safety on Track of Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha 410075, China

Z. J. Guo |
Key Laboratory of Traffic Safety on Track of Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha 410075, China

نشانی اینترنتی https://www.jafmonline.net/article_937_a5c142d9670813ccd6f08b342f7e607b.pdf
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