The influence of wall roughness on tunnel ventilation friction

DOI

10.2991/eeeis-16.2017.69How to use a DOI?

Keywords

Tunnel ventilation; Friction loss; Numerical simulation; Wall roughness.

Abstract

To study the effect of surface roughness on the ventilation tunnel wall friction coefficient, the fluent software model was used by changing the height and distance of the tunnel roughness elements and cross-sectional diameter to observe the influence of these control factors in tunnel ventilation. The results showed that: when the air flow velocity is small and brushed the wall, the flow line near the wall substantially parallel to the outer contour of the roughness elements; when the flow rate exceeds a certain value, the flow lines near the wall will have a certain degree of turbulence and reflux. With the same initial wind speed, the more rough wall can make the more friction loss, and the less wall roughness makes the rough elements have less influence on the fluid flow.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Yun-Xiao Xin
AU  - Ya-Qiong Wang
AU  - Yi-Kai Wu
PY  - 2016/12
DA  - 2016/12
TI  - The influence of wall roughness on tunnel ventilation friction
BT  - Proceedings of the 2nd Annual International Conference on Electronics, Electrical Engineering and Information Science (EEEIS 2016)
PB  - Atlantis Press
SP  - 556
EP  - 566
SN  - 2352-5401
UR  - https://doi.org/10.2991/eeeis-16.2017.69
DO  - 10.2991/eeeis-16.2017.69
ID  - Xin2016/12
ER  -