Flow structure around high-speed train in open air

Autor:	Mingzhi Yang, Sha Huang, Hong-qi Tian
Rok vydání:	2015
Předmět:	Turbulence business.industry Flow (psychology) Airflow Metals and Alloys General Engineering Mechanics Wake Vortex Physics::Fluid Dynamics Drag Turbulence kinetic energy Aerospace engineering business Geology Intensity (heat transfer)
Zdroj:	Journal of Central South University. 22:747-752
ISSN:	2227-5223 2095-2899
DOI:	10.1007/s11771-015-2578-7
Popis:	According to the analysis of the turbulent intensity level around the high-speed train, the maximum turbulent intensity ranges from 0.2 to 0.5 which belongs to high turbulent flow. The flow field distribution law was studied and eight types of flow regions were proposed. They are high pressure with air stagnant region, pressure decreasing with air accelerating region, low pressure with high air flow velocity region I, turbulent region, steady flow region, low pressure with high air flow velocity region II, pressure increasing with air decelerating region and wake region. The analysis of the vortex structure around the train shows that the vortex is mainly induced by structures with complex mutation and large curvature change. The head and rear of train, the underbody structure, the carriage connection section and the wake region are the main vortex generating sources while the train body with even cross-section has rare vortexes. The wake structure development law studied lays foundation for the train drag reduction.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d940b5f8600a9bd7b29b9c681449fb2f https://doi.org/10.1007/s11771-015-2578-7 Zobrazit plný text záznamu Full text from SpringerLink