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Wind and Structures Volume 24, Number 2, February 2017 , pages 171-184 DOI: https://doi.org/10.12989/was.2017.24.2.171 |
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Wind tunnel tests on flow fields of full-scale railway wind barriers |
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Yang Su, Huoyue Xiang, Chen Fang, Lei Wang and Yongle Li
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| Abstract | ||
| The present study provides a deeper understanding of the flow fields of a full-scale railway wind barriers by means of a wind tunnel test. First, the drag forces of the three wind barriers were measured using a force sensor, and the drag force coefficients were compared with a similar scale model. On this basis, the mean wind velocity and turbulence upwind and downwind of the wind barriers were measured. The effects of pore size and opening forms of the wind barrier were discussed. The results show that the test of the scaled wind barrier model may be unsafe, and it is suitable to adopt the full-scale wind barrier model. The pore size and the opening forms of wind barriers have a slight influence on the flow fields upwind of the wind barrier but have some influences on the flow fields and power spectra downwind of the wind barrier. The smaller pore size generates a lower turbulence density and value of the power spectrum near the wind barrier, and the porous wind barriers clearly provide better shelter than the bar-type wind barriers. | ||
| Key Words | ||
| wind barrier; full-scale; wind tunnel test; flow fields; power spectra | ||
| Address | ||
| Yang Su, Huoyue Xiang, Chen Fang, Lei Wang and Yongle Li: Department of Bridge Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China | ||