CLC number: U453.5
On-line Access: 2024-08-27
Received: 2023-10-17
Revision Accepted: 2024-05-08
Crosschecked: 2018-12-06
Cited: 0
Clicked: 4484
Ming-nian Wang, Tao Deng, Li Yu, Xu Wang. A uniform air flow distribution design strategy for use in tunnel transverse ventilation systems[J]. Journal of Zhejiang University Science A, 2019, 20(2): 98-108.
@article{title="A uniform air flow distribution design strategy for use in tunnel transverse ventilation systems",
author="Ming-nian Wang, Tao Deng, Li Yu, Xu Wang",
journal="Journal of Zhejiang University Science A",
volume="20",
number="2",
pages="98-108",
year="2019",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1800230"
}
%0 Journal Article
%T A uniform air flow distribution design strategy for use in tunnel transverse ventilation systems
%A Ming-nian Wang
%A Tao Deng
%A Li Yu
%A Xu Wang
%J Journal of Zhejiang University SCIENCE A
%V 20
%N 2
%P 98-108
%@ 1673-565X
%D 2019
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1800230
TY - JOUR
T1 - A uniform air flow distribution design strategy for use in tunnel transverse ventilation systems
A1 - Ming-nian Wang
A1 - Tao Deng
A1 - Li Yu
A1 - Xu Wang
J0 - Journal of Zhejiang University Science A
VL - 20
IS - 2
SP - 98
EP - 108
%@ 1673-565X
Y1 - 2019
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1800230
Abstract: We focused mainly on a uniform air flow distribution design strategy for a multi-perforated air supply duct with a multi-blade opposed regulation damper. This design is especially required in tunnel transverse ventilation systems, in which a uniform air flow distribution is needed to dilute vehicle exhaust gases or vehicle emissions to acceptable concentrations. First, local resistance coefficients arising when air flows out of the duct through the damper were investigated by means of dimensional analysis and computational fluid dynamics (CFD) simulation, and a mutual authentication was performed with 3D and 2D simulation results. This revealed that the ratio of the velocity in the duct and the damper, and the blade opening angle are the two main factors affecting the resistance coefficient. Second, theoretical analysis based on Bernoulli’s equation was implemented to establish the relationship between the local resistance coefficient and the pressure drop. Based on the simulation results, a uniform air flow distribution design strategy corresponding to the opening angle adjustment was obtained. Finally, a calculation case study was carried out, and sufficient consistency between the theoretical and numerical calculation results was achieved, verifying the reliability of the design strategy.
This paper mainly provides 1) interesting reference data of loss coefficient values for a particular type of damper and 2) an elegant analytical method for designing duct systems for equal airflow from each outlet.
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