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Numerical Simulation of the Impact of Smoke Management Scenarios on Visibility of a Car Park | ||
| AUT Journal of Mechanical Engineering | ||
| دوره 9، شماره 2، 2025، صفحه 113-122 اصل مقاله (1.86 M) | ||
| نوع مقاله: Research Article | ||
| شناسه دیجیتال (DOI): 10.22060/ajme.2025.23512.6140 | ||
| نویسندگان | ||
| Ghodrat Ghassabi* 1؛ Mahmood Moghaddam2؛ Seyed Sajad Noorbakhsh1؛ Frahad Yeganeh1؛ Mahmood Moghddam2 | ||
| 1Department of Mechanical Engineering, Faculty of Engineering, Bozorgmehr University of Qenat, Qaen, Iran | ||
| 2Arman Tahviye Sanabad Company, Mashhad, Iran | ||
| چکیده | ||
| The mechanical ventilation smoke management system involves the use of supply fans, jet fans, and exhaust fans, which are activated at different times after a fire is extinguished. This paper numerically investigates the effect of the priority and delay of smoke management systems on smoke distribution and visibility in a car park after a fire, using Fire Dynamic Simulation Code 6.7.6. The flow rates of the exhaust fan, supply fan, and jet fan are 1.9 m³/s, 1.43 m³/s, and 1.67 m³/s, respectively. The fire, located near the supply fans, is modeled as a rectangle with dimensions of 2.0 × 0.8 m² and a power of 1.6 MW, lasting for one minute from ignition to extinguishment. Polyurethane is assumed as a flammable material. The priority and delay of the smoke management systems are evaluated through four scenarios over a period of 420 seconds. The results show that visibility reaches acceptable levels in all scenarios at all locations after 420 seconds. Additionally, the results indicate that the visibility of the upper half is highest for scenario a, at around 15 m. However, the visibility of the lower half is highest for scenario d, ranging between 20 and 30 m. It can be concluded that delaying the activation of smoke management systems is an effective strategy for facilitating smoke removal and fresh air intake. | ||
| کلیدواژه‌ها | ||
| Fire Dynamic Simulation؛ Fire؛ Supply Fan؛ Jet Fan؛ Exhaust Fan | ||
| مراجع | ||
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[1] L. Liao, H. Li, P. Li, X. Bao, C. Hong, D. Wang, X. Xie, J. Fan, P. Wu, Underground Evacuation and Smoke Flow Simulation in Guangzhou International Financial City during Fire, Fire, 6(7) (2023) 266.
[2] M. Xu, D. Peng, PyroSim-Based Numerical Simulation of Fire Safety and Evacuation Behaviour of College Buildings, International Journal of Safety and Security Engineering, 10 (2020) 293-299.
[3] X. Long, X. Zhang, B. Lou, Numerical Simulation of Dormitory Building Fire and Personnel Escape Based on Pyrosim and Pathfinder, Journal of the Chinese Institute of Engineers, 40(3) (2017) 257-266.
[4] Y. Zhou, R.w. Bu, Z.s. Xu, H.j. Chen, J.h. Gong, Numerical Simulation of Smoke Control Effectiveness With Different Exhaust Modes In A Large Subway Station, Procedia Engineering, 211 (2018) 1065-1074.
[5] R. Wang, s. He, H. Yue, Numerical Study of Smoke Spread upon Shaft-box Type Double Skin Facades, Procedia Engineering, 211 (2018) 755-761.
[6] M. Kmecová, M. Krajčík, Z. Straková, Designing Jet Fan Ventilation for an Underground Car Park by CFD Simulations, Periodica Polytechnica Mechanical Engineering, 63(1) (2019) 39-43.
[7] A.C.Y. Yuen, T.B.Y. Chen, W. Yang, C. Wang, A. Li, G.H. Yeoh, Q.N. Chan, M.C. Chan, Natural Ventilated Smoke Control Simulation Case Study using Different Settings of Smoke Vents and Curtains in a Large Atrium, Fire, 2(1) (2019) 7.
[8] B. Hakimzadeh, M.R. Talaee, Analysis of Distribution of Toxic Species of a Fired Train in Ventilated Tunnel, Journal of Transportation Safety & Security, 13(7) (2019) 780-802.
[9] J. Wang, C. Du, H. Zhang, Numerical Simulation of Smoke Natural Filling in Ultra-Thin and Tall Atrium, Case Studies in Thermal Engineering, 28 (2021) 101.
[10] F. Behbahani, M. Hamzei, Z. Mehrdoost, M. Moghiman, Numerical Simulations on Visibility And Temperature in a Car Park of a Commercial Building, Journal of Manufacturing Engineering, 18(4) (2023) 141-144.
[11] Y. Wong, C. Voon Sia, K. Chong, M. Julaihi, A. Joseph, Numerical Study on the Smoke Movement in Office Rooms with Various Exhaust Vents Settings, Materials Today: Proceedings, 72(6) (2023) 2971-2977.
[12] T. Nguyen, H. Bui, Computational Fluid Dynamic Model for Smoke Control of Building Basement, Case Studies in Chemical and Environmental Engineering, 7 (2023) 100.
[13] X. Li, R. Chen, Y. Zhu, C.Y. Jim, Emergency Fire Evacuation Simulation of Underground Commercial Street, Simulation Modelling Practice and Theory, 134 (2024) 109.
[14] BS 7346-7, in: Components for smoke and heat control systems Part 7: Code of practice on functional recommendations and calculation methods for smoke and heat control systems for covered car parks, BSI Standards Publication, 2013.
[15] Fire Dynamics Simulator User’s Guide, Fire Safety Research Institute, UL Research Institutes, Columbia, Maryland, 2024.
[16] B.S. Pope, Turbulence Flows, Cambridge University Press, United States of America, New York, 2007. | ||
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آمار تعداد مشاهده مقاله: 315 تعداد دریافت فایل اصل مقاله: 257 |
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