期刊
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
卷 167, 期 -, 页码 128-139出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jweia.2017.04.018
关键词
Moving model device; Oblique tunnel portal; High-speed train; Pressure gradient; Micro-pressure wave
资金
- National Science Foundation Major Program in China [U1134025, U1534210]
The objective of this study was to investigate the effects of oblique tunnel portals on train and tunnel aerodynamics using a 1:20 scale moving model device. Transient pressure and micro-pressure waves were measured using pressure sensors as the train model travelled through various tunnel models at a speed of 350 km/h. The mitigation physical mechanism of oblique tunnel portal on the initial compression wave was explained. Experimental results showed that oblique tunnel portals had obvious mitigation effect on- the pressure gradient and micro-pressure wave induced by the train model passing through the tunnel model. A hat oblique tunnel portal combined with a buffer structure with top holes was particularly effective.
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