Numerical Research on the Mixture Mechanism of Polluted and Fresh Air at the Staggered Tunnel Portals
Abstract
:1. Introduction
2. Mathematical Model
2.1. Governing Equations and Numerical Algorithm
2.2. Computational Geometry, Domain, and Grid
2.3. Grid Dependence Study
2.4. Boundary Conditions
2.5. Validation
3. Numerical Simulation Results and Discussions
3.1. Flow Characteristic
3.2. Variation Characteristics of Circulating Air Mixing Ratio
3.2.1. The Relationship between Circulating Air Mixing Ratio and the Air Velocity at the Inlet/Outlet
3.2.2. The Relationship between Circulating Air Mixing Ratio and Tunnel Structure Parameters
3.3. Construction and Validation of Circulating Air Mixing Ratio Model
4. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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No. | Length L/m | Cross-Sectional Area A/m2 | D/m | d/m | Δl/m | Front Slope of Tunnel Portal/° |
---|---|---|---|---|---|---|
#1 | 3875 | 54.3 | 7.6 | 8 | 43 | 15° |
#2 | 3580 | 67.3 | 8.4 | 6 | 0 | 20° |
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Zhang, X.; Zhang, T.; Zhu, K.; Huang, Z.; Wu, K. Numerical Research on the Mixture Mechanism of Polluted and Fresh Air at the Staggered Tunnel Portals. Appl. Sci. 2018, 8, 1365. https://doi.org/10.3390/app8081365
Zhang X, Zhang T, Zhu K, Huang Z, Wu K. Numerical Research on the Mixture Mechanism of Polluted and Fresh Air at the Staggered Tunnel Portals. Applied Sciences. 2018; 8(8):1365. https://doi.org/10.3390/app8081365
Chicago/Turabian StyleZhang, Xin, Tianhang Zhang, Kai Zhu, Zhiyi Huang, and Ke Wu. 2018. "Numerical Research on the Mixture Mechanism of Polluted and Fresh Air at the Staggered Tunnel Portals" Applied Sciences 8, no. 8: 1365. https://doi.org/10.3390/app8081365