بررسی عددی تاثیر باد جانبی در حریق راه پله ساختمان بلند با نرم افزار پایروسیم

نوع مقاله : مقاله پژوهشی

نویسندگان

فاطمه بهبهانی ¹

مهدی حمزه ای ²

زهرا مهردوست ²

محمد مقیمان ³

¹ گروه مهندسی مکانیک؛ واحد اهواز، دانشگاه آزاد اسلامی، اهواز، ایران

² گروه مهندسی مکانیک، واحد اهواز، دانشگاه آزاد اسلامی، اهواز، ایران

³ گروه مهندسی مکانیک، دانشگاه فردوسی، مشهد، ایران

10.22067/jacsm.2024.81802.1178

چکیده

ساختمان‌های با ارتفاع زیاد معمولا در معرض وزش باد هستند. به جز اثر دودکشی، حرکت دود و رفتار حریق به شدت تحت تاثیر نیروهای باد خارجی می‌باشد. در این پژوهش تاثیر باد جانبی به صورت عددی با نرم‌افزار پایروسیم و به‌کارگیری معادلات ناویراستوکس، انرژی، بقا جرم، حریق و توزیع دود بررسی شد و برای آشفتگی از مدل شبیه‌سازی گردابه‌های بزرگ استفاده شده است. برای اعتبارسنجی نتایج با پژوهش ژاو و همکاران مقایسه گردید. سرعت باد جانبی بین 0 تا 2/1 متر بر ثانیه در نظر گرفته شد. تاثیر باد جانبی بر دمای دود در گرمای آزاد شده مختلف ارزیابی شد. گرمای آزاد شده در سه حالت 300، 500 و 900 کیلووات در نظر گرفته شد. در گرمای آزاد شده ثابت، دما در ابتدا افزایش می‌باید تا به یک پیک دمایی برسد سپس با افزایش سرعت باد میزان دما کاهش می‌یابد. هم چنین با افزایش سرعت باد میزان غلظت کربن مونوکسید حدود %3 بیشتر شد. نتایج نشان داد که باد جانبی، خطر حریق را افزایش می‌دهد و می‌بایست در طراحی ساختمان‌های در معرض باد مورد توجه قرار گیرد.

کلیدواژه‌ها

حرکت دود

رفتار حریق

باد جانبی

نرم‌افزار پایروسیم

دمای دود

موضوعات

• احتراق

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عنوان مقاله English

Numerical Verification of the Effect of Side Wind on Fire of the Staircase of a Tall Building With Pyrosim Software

نویسندگان English

Fatemeh Behbahani ¹

Mahdi Hamzei ²

Zahra Mehrdoost ²

Mohammad Moghiman ³

¹ Department of Mechanical Engineering, Ahvaz, Iran

² Department of Mechanical Engineering, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran

³ Department of Mechanical Engineering, Ferdowsi University, Mashhad, Iran

چکیده English

High-rise buildings are usually exposed to wind. Except for the chimney effect, smoke movement and fire behavior are strongly influenced by external wind forces. In this research, the effect of side wind was investigated numerically with Pyrosim software and using the Navirastox equations, energy, mass survival, fire and smoke distribution, and the large eddy simulation model was used for turbulence. For validation, the results were compared with Zhao et al.'s research. The side wind speed was considered between 0 and 1.2 m/s. The effect of side wind on smoke temperature was evaluated at different released heat. The released heat was considered in three modes of 300, 500 and 900 kW. In the case of constant released heat, the temperature should increase at first until it reaches a temperature peak, then the temperature decreases with the increase in wind speed. Also, with the increase in wind speed, the concentration of carbon monoxide increased by about 3%. The results showed that the side wind increases the risk of fire and should be considered in the design of buildings exposed to the wind.

کلیدواژه‌ها English

Smoke Movement

Fire Behavior

Side Wind

Pyrosim Software

Smoke Temperature

مراجع

[1] X. Wang, C. Fleischmann, and M. Spearpoint, “Applying the FDS pyrolysis model to predict heat release rate in small-scale forced ventilation tunnel experiments,” Fire Safety Journal, vol. 112, pp. 102946, 2020. https://doi.org/10.1016/j.firesaf.2020.102946

[2] B. Manzoor, I. Othman, and A. Waheed, “Accidental safety factors and prevention techniques for high-rise building projects – A review,” Ain Shams Engineering Journal, vol. 13, no. 5, pp. 101723, 2022. https://doi.org/10.1016/j.asej.2022.101723

[3] H. W. Yao, W. L. Dong, D. Liang, A. Rogner, and J. W. Lai, “Simulation of full-scale smoke control in atrium.” Procedia Engineering, vol. 1, no. 11, pp. 608-613, 2011. https://doi.org/10.1016/j.proeng.2011.04.703

[4] X. Q. Sun, L. H. Hu, W. K. Chow, Y. Xu, and F. Li, “A theoretical model to predictplume rise in shaft generated by growing compartment fire,” Elsevier International Journal of Heat and Mass Transfer , vol. 54, no. 4, pp. 910-920, 2011. https://doi.org/10.1016/j.ijheatmasstransfer.2010.10.012

[5] H. Omrany, A. Ghaffarianhoseini, R. Chang, A. Ghaffarianhoseini, and F. Pour Rahimian, “Applications of Building information modelling in the early design stage of high-rise buildings,” Automation in Construction, vol. 1, no. 152, pp. 104934, 2023. https://doi.org/10.1016/j.autcon.2023.104934

 [6]          W. X. Shi, J. Ji, J. H. Sun, S. M. Lo, L. J. Li, and X. Y. Yuan, “Experimental study on influence of stack effect on fire in the compartment adjacent to stairwell of high rise building,” Journal of Civil Engineering and Management, vol. 20, no. 1, pp. 121-131, 2014. https://doi.org/10.3846/13923730.2013.802729

[7] D. Qi, L. Wang, and R. Zmeureanu, “The Effects of Non-uniform Temperature Distribution on Neutral Plane Level in Non-adiabatic High-Rise Shafts During Fires,” Fire Technology, vol. 53, no.1, pp. 153-172, 2017. https://doi.org/10.1007/s10694-015-0554-2

[8] J. Ji, L. J. Li, W. X. Shi, C. G. Fan, and J. H. Sun, “Experimental investigation on the rising characteristics of the fire-induced buoyant plume in stairwells,” International Journal of Heat and Mass Transfer, vol. 64, no. 1, pp. 193-201, 2013. https://doi.org/10.1016/j.ijheatmasstransfer.2013.04.030

[9] L. J. Li, J. Ji, W. X. Shi, Z. H. Gao, J. H. Sun, and J. P. Zhu, “A modified turbulent mixing model with the consideration of heat transfer between hot buoyant plume and sidewalls in a closed stairwell,” International Journal of Heat and Mass Transfer, vol. 84, no. 1, pp. 521-528, 2015. https://doi.org/10.1016/j.ijheatmasstransfer.2015.01.012

[10] L. Xue, S. Yuan, and Q. He, “A Comparative Study on the Influence of Ventilation on Weather- and Fire-Induced Stack Effect in the Elevator Shafts of a High-Rise Building,” Fire Technology, vol. 54, no. 1,  pp. 163-186, 2018. https://doi.org/10.1007/s10694-017-0679-6

[11] J. Ji, X. Yuan, K. Li, L. Yang, and J. Sun, “A mathematical model for burning rate of n-heptane pool fires under external wind conditions in long passage connected to a shaft,” Applied Thermal Engineering, vol. 116, no. 1, pp. 91-99, 2017. https://doi.org/10.1016/j.applthermaleng.2016.12.144

[12] L. Hu, X. Sun, X. Zhang, and F. Ren, “Facade flame height and horizontal extending distance from opening of compartment fire with external sideward wind,” Proceedings of the Combustion Institute, vol. 37, no. 3, pp. 3859-3867, 2019. https://doi.org/10.1016/j.proci.2018.06.201

[13] J. Ji, Y. Y. Fu, C. G. Fan, Z. H. Gao, and K. Y. Li, “An experimental investigation on thermal characteristics of sidewall fires in corridor-like structures with varying width,” International Journal of Heat and Mass Transfer, vol. 84, no. 1, pp. 562–570, 2015. https://doi.org/10.1016/j.ijheatmasstransfer.2015.01.020

 [14] H. Kikuchi, Y. Tamura, H. Ueda, and K. Hibi, “Dynamic wind pressures acting on a tall building model - Proper orthogonal decomposition,” Journal of Wind Engineering and Industrial Aerodynamics, vol. 69, no. 1, pp. 631–649, 1997. https://doi.org/10.1016/S0167-6105(97)00193-1

[15]  H. Chen, N. Liu, and W. Chow, “Wind effects on smoke motion and temperature of ventilation-controlled fire in a two-vent compartment,” Building and Environment, vol. 44, no. 12, pp. 2521-2526, 2009. https://doi.org/10.1016/j.buildenv.2009.04.008

[16]  M. Li, Z. Gao, J. Ji, K. Li, and J. Sun, “Wind effects on flame projection probability from a compartment with opposing openings,” Fire Safety Journal, vol. 91, pp. 414-421, 2017. https://doi.org/10.1016/j.firesaf.2017.04.037

[17] J. Ji, X. Yuan, K. Li, and J. Sun, “Influence of the external wind on flame shapes of n-heptane pool fires in long passage connected to a shaft.” Combustion and Flame, vol. 162, no. 5, pp. 2097-2107, 2015.

[18] O. Sugawa, D. Momita, and W. Takahashi, “Flow Behavior Of Ejected Fire Flamelplume From An Opening Effected By External Side Wind,” Fire Saf. Sci., vol. 5, pp. 249-260, (1997).

[19] L. Zhu, X. Yuan, Z. Gao, and J. Ji, “Experimental Investigation of Effect of ExternalSide Wind on Fire Behaviors in a Corridor Connected to a Shaft,” Fire Technology., vol. 56, no. 2, pp. 863-881, 2020. https://doi.org/10.1007/s10694-019-00907-8

[20] J. Ji, L. Zhu, L. Ding, L. Yu, and H. Wan, “Numerical Investigation of External WindEffect on Smoke Characteristics in a Stairwell,” Fire Technology., vol. 56, no. 4, pp. 1681–1702, 2020. https://doi.org/10.1007/s10694-020-00948-4

 [21] S. C. Li, Y. Chen, X. Chen, and G. G. Jing, “Engineering numerical simulation on the amount of make-up air for mechanical smoke exhaust in atrium,” Procedia Engineering, vol. 1, no. 11, pp. 379-384, 2011. https://doi.org/10.1016/j.proeng.2011.04.672

[22] S. Lu, Y. H. Wang, R. F. Zhang, and H. P. Zhang, “Numerical study on impulse ventilation for smoke control in an underground car park,” in Procedia Engineering. vol. 11,  pp. 369-374, 2011. https://doi.org/10.1016/j.proeng.2011.04.671

[23] P. A. Enright, “Impact of jet fan ventilation systems on sprinkler activation,” Case Studies in Fire Safety, vol. 1, pp. 1-7, 2014. https://doi.org/10.1016/j.csfs.2013.11.002

[24] W. Zhang, A. Hamer, M. Klassen, D. Carpenter, and R. Roby, “Turbulence statistics in a fire room model by large eddy simulation,” Fire Safety Journal, vol. 37, no. 8, pp. 721-752, 2002. https://doi.org/10.1016/S0379-7112(02)00030-9

 [25] Z. Gao, X. Yuan, J. Ji. Y. Li, and L. Yang, “Influence of stack effect on flame shapes of gas burner fires,” Applied Thermal Engineering, vol. 127, no. 25, pp. 1574-1581, 2017. https://doi.org/10.1016/j.applthermaleng.2017.08.110

[26] Z. Nurizaty et al. “Experimental Investigation on Post-Fire Performances of Fly Ash Concrete Filled Hollow Steel Column,” Int. J. High-Rise Build., vol. 10, no. 4, pp. 335-344, (2021).

[27] V. Kodur, P. Kumar, and M. M. Rafi, “Fire hazard in buildings: review, assessment and strategies for improving fire safety,” PSU Res. Rev., vol. 4. No, 1, pp. 1-23, 2020. https://doi.org/10.1108/PRR-12-2018-0033