شبیه‏‌سازی عددی آتش در اتاق با مدل احتراقی تولید ‏فلیملت‏ منیفولد و مقایسه با مدل‏‌های احتراقی دیگر

نوع مقاله : مقاله پژوهشی

نویسندگان

دانشکده مهندسی مکانیک، دانشگاه تربیت مدرس، تهران، ایران.

چکیده

در این مقاله، از روش شبیه‌‏سازی گردابه‌‏های بزرگ استفاده شد و روش تک-معادله‏‌ای به عنوان روش زیر شبکه اتخاذ گردید. همچنین شبیه‏‌سازی‏‌ها به صورت سه‌‏بعدی، غیر دائم و تک فاز انجام می‌‏شود و عدد فرود 0/۰۰۰۲۵۵ در نظر گرفته می‏‌شود. به‌منظور بررسی دقیق اثر مدل احتراقی، مدل احتراقی تولید ‏فلیملت‏ منیفولد در شبیه‌‏سازی آتش در اتاق استفاده می‏‌شود و نتایج این مدل احتراقی با مدل‌‏های سینتیک بسیار سریع و اضمحلال گردابه مقایسه می‌شود. با مقایسه‌‏ی نتایج مشاهده می‌‏شود که در سناریوی آتش در فضای اتاق با نرخ آزادسازی حرارت 62/9 کیلووات، دمای متوسط در شعله به‌طور تقریبی ۱۵۰۰ کلوین می‌‏شود. همچنین، نتایج مدل احتراقی اضمحلال گردابه و سینتیک بسیار سریع بهتر از مدل احتراقی ‌تولید ‏فلیملت‏ منیفولد نتایج دما را پیش‌‏بینی کرده‌‏اند؛ اما در پیش‌‏بینی سرعت هر سه مدل احتراقی با خطای نسبی کمتر از ۱۰ درصد، به نتایج تجربی نزدیک هستند. با توجه به هزینه‏‌ی محاسباتی پایین مدل تولید ‏فلیملت‏ منیفولد و توانایی استفاده از سینتیک کامل در این مدل احتراقی و همچنین دقت قابل قبول آن، استفاده از این مدل در شبیه‌‏سازی آتش در اتاق، مناسب است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Numerical Simulation of Compartment Fire with Flamelet Generated Manifold and Comparison with Other Combustion Models

نویسندگان [English]

  • mohamad safarzadeh
  • Ghassem Heidarinejad
  • Hadi PasdarShahri
tarbiat modares university
چکیده [English]

In this paper, the large eddy simulation was used and the one-equation method was adopted as the sub-grid method. In addition, the simulations are performed in three-dimensional, unsteady, and single-phase case and the Froude number is considered 0.000255. To investigate the effect of the combustion model, the combustion model of flamelet generated manifold is used in the simulation of fire in the room and the results of this combustion model are compared with infinite fast chemistry models and eddy dissipation models. Comparing the results, it can be seen that in the fire scenario in the room with a heat release rate of 62.9 kW, the mean temperature in the flame is approximately 1500 Kelvin. Also, the results of the eddy dissipation combustion model and infinite fast chemistry predict the temperature results better than the flamelet generated manifold combustion model; but, all three combustion models are close to experimental results with a relative error of less than 10%, in predicting the velocity. Due to the low computational cost of the flamelet generated manifold model and the ability to use detailed kinetics in this combustion model, as well as its acceptable accuracy, it is appropriate to use this model in the compartment fire simulation.

کلیدواژه‌ها [English]

  • Compartment fire
  • Large eddy simulation
  • Combustion model
  • Flamelet generated manifold
[1] G. Yeoh, R. Yuen, S. Chueng, W. Kwok, On modelling combustion, radiation and soot processes in compartment fires, Building and Environment, 38(6) (2003) 771-785.
[2] X. Chen, S. Lu, X. Wang, K.M. Liew, C. Li, J. Zhang, Pulsation behavior of pool fires in a confined compartment with a horizontal opening, Fire technology, 52(2) (2016) 515-531.
[3] G.H. Yeoh, K.K. Yuen, Computational Fluid Dynamics in Fire Engineering, Computational Fluid Dynamics in Fire Engineering,  (2009).
[4] A. Yuen, G. Yeoh, V. Timchenko, S. Cheung, T. Chen, Study of three LES subgrid-scale turbulence models for predictions of heat and mass transfer in large-scale compartment fires, Numerical Heat Transfer, Part A: Applications, 69(11) (2016) 1223-1241.
[5] M. Safarzadeh, G. Heidarinejad, H. Pasdarshahri, Numerical Investigation of Compartment Fire under Maximum and Minimum of Natural Ventilation using FGM Combustion Model, Amirkabir Journal of Mechanical Engineering (2021), (in Persian).
[6] M. Safarzadeh, G. Heidarinejad, H. Pasdarshahri, Evaluation of LES sub-grid scale models and time discretization schemes for prediction of convection effect in a buoyant pool fire, Heat and Mass Transfer,  (2020) 1-16.
[7] A.C.Y. Yuen, G.H. Yeoh, V. Timchenko, T. Barber, LES and multi-step chemical reaction in compartment fires, Numerical Heat Transfer; Part A: Applications, 68 (2015) 711-736.
[8] H. Xue, J. Ho, Y. Cheng, Comparison of different combustion models in enclosure fire simulation, Fire Safety Journal, 36(1) (2001) 37-54.
[9] G. Maragkos, B. Merci, Large Eddy Simulations of CH4 Fire Plumes, Flow, Turbulence and Combustion, 99 (2017) 239-278.
[10] Y.-L. Huang, H.-R. Shiu, S.-H. Chang, W.-F. Wu, S.-L. Chen, Comparison of combustion models in cleanroom fire, Journal of Mechanics, 24(3) (2008) 267-275.
[11] S.C.P. Cheung, G.H. Yeoh, A.L.K. Cheung, R.K.K. Yuen, S.M. Lo, Flickering behavior of turbulent buoyant fires using large-eddy simulation, Numerical Heat Transfer; Part A: Applications, 52 (2007) 679-712.
[12] J.A. van Oijen, A. Donini, R.J.M. Bastiaans, J.H.M. ten Thije Boonkkamp, L.P.H. de Goey, State-of-the-art in premixed combustion modeling using flamelet generated manifolds, Progress in Energy and Combustion Science, 57 (2016) 30-74.
[13] Y. Xing, T. Zhang, Z. Tian, J. Li, Y. Yan, Large eddy simulation of a turbulent non-premixed flame based on the flamelet-generated manifolds approach and a reduced mechanism verification, Aerospace Science and Technology,  (2020) 105952.
[14] H.F. Mrema, G.V. Candler, Large eddy simulation of supersonic combustion using the flamelet/progress-variable approach and the evolution-variable manifold approach, AIAA Scitech 2019 Forum,  (2019) 1-20.
[15] M. Safarzadeh, G. Heidarinejad, H. Pasdarshahri, Simulation of Pool and Compartment Fire Using Flamelet Generated Manifold With/Without Radiation Coupling, Arabian Journal for Science and Engineering,  (2021) 1-10.
[16] M. Safarzadeh, G. Heidarinejad, H. Pasdarshahri, Air curtain to control smoke and fire spread in a ventilated multi-floor building, International Journal of Thermal Sciences, 159,  106612, (2021).
[17] S.M.J. Razeghi, M. Safarzadeh, H. Pasdarshahri, Comparison of combustion models based on fast chemistry assumption in large eddy simulation of pool fire, Journal of the Brazilian Society of Mechanical Sciences and Engineering, 42(4) (2020).
[18] G. Heidarinejad, H. Pasdarshahri, K. Mazaheri, Evaluation of Induced-Flow in a Two-Room Compartment Fire Using Large Eddy Simulation, Modares Mechanical Engineering, 13(4) (2013) 74-85, (in Persian).
[19] A.C.Y. Yuen, G.H. Yeoh, V. Timchenko, S.C.P. Cheung, T.J. Barber, Importance of detailed chemical kinetics on combustion and soot modelling of ventilated and under-ventilated fires in compartment, International Journal of Heat and Mass Transfer, 96 (2016) 171-188.
[20] H. Pasdarshahri, G. Heidarinejad, K. Mazaheri, Large eddy simulation on one-meter methane pool fire using one-equation sub-grid scale model, in:  MCS, pp. 11-15, (in Persian).
[21] S.C.P. Cheung, G.H. Yeoh, A fully-coupled simulation of vortical structures in a large-scale buoyant pool fire, International Journal of Thermal Sciences, 48 (2009) 2187-2202.
[22] H. Bongers, J.A. Van Oijen, L.P.H. De Goey, Intrinsic low-dimensional manifold method extended with diffusion, Proceedings of the Combustion Institute, 29 (2002) 1371-1378.
[23] L.M. Verhoeven, W.J.S. Ramaekers, J.A. van Oijen, L.P.H. De Goey, Modeling non-premixed laminar co-flow flames using flamelet-generated manifolds, Combustion and Flame, 159 (2012) 230-241.
[24] S. Pohl, G. Frank, M. Pfitzner, J. Matheis, S. Hickel, Flamelet generated manifolds for modeling turbulent non-premixed combustion in OpenFOAM.
[25] K.D. Steckler, J.G. Quintiere, W.J. Rinkinen, Flow induced by fire in a compartment, in:  Symposium (international) on combustion, Elsevier, 1982, pp. 913-920.
[26] G.H. Yeoh, R.K.K. Yuen, S.C.P. Chueng, W.K. Kwok, On modelling combustion, radiation and soot processes in compartment fires, Building and Environment, 38 (2003) 771-785.
[27] G. Maragkos, T. Beji, B. Merci, Advances in modelling in CFD simulations of turbulent gaseous pool fires, Combustion and Flame, 181 (2017) 22-38.