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Iranian Journal of Chemistry and Chemical Engineering، جلد ۴۳، شماره ۴، صفحات ۱۸۱۰-۱۸۲۳
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| عنوان فارسی |
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| چکیده فارسی مقاله |
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| کلیدواژه‌های فارسی مقاله |
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| عنوان انگلیسی |
Experimental and Numerical Investigation of Fire Dynamics Inside the Closed Enclosure |
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| چکیده انگلیسی مقاله |
Experimental and numerical studies have been conducted in an enclosure of size 4m × 4m × 4m to determine burning characteristics and the thermal environment inside the closed enclosure. The fire source is a 60 cm diameter isopropanol fuel placed in the center of the enclosed space. The thermal environment was measured along the enclosure's heights and at the longitudinal orientation of the ceiling. The highest temperatures recorded at roof locations C1, C6, C11, and C16 were 175 °C, 182 °C, 190 °C, and 177 °C, respectively. Initially, the mass loss rate increased with time, reaching a maximum value of 25.5 g/m2 s before decreasing with time. The rate of release of energy is a key parameter that needs to be known for the proper design of the fire protection system. In the present study, the enthalpy balance method was used to predict the rate of heat release.The maximum deviation of heat release rate between the experimental and predicted enthalpy balance was found to be about 20%. Energy transfer to the enclosure surfaces was found to occur at a rate of about 91.2% of the total energy released, whereas energy transfer to gases occurred at a rate of 9.8% of the total energy losses. Numerical studies were performed using the Fire Dynamic Simulator (FDS) to investigate the local characteristics of fires. Isopropanol's Limiting Oxygen Concentration (LOC) was found to be 11 vol.% under stoichiometric conditions. The self-extinction time was observed at 840 s from the ignition which is in good agreement with the semi-empirical equation proposed at different studies. |
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| کلیدواژه‌های انگلیسی مقاله |
Heat Release Rate,Heat Flux,Temperature,Isopropanol,Mass loss Rate |
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| نویسندگان مقاله |
Deepak Sahu |
Department of Chemical Engineering, Dr. B R Ambedkar National Institute of Technology Jalandhar, Jalandhar, 144027, Punjab, INDIA
Bhisham Kumar Dhurandher |
School of Mechanical Engineering, VIT Chennai, INDIA
Shorab Jain |
Fire Research Division, CSIR- Central Building Research Institute, Roorkee, Roorkee – 247667, Uttarakhand, INDIA
Akhilesh Gupta |
Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, Uttarakhand, INDIA
Surendra Kumar |
Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee -247667, Uttarakhand- INDIA
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| نشانی اینترنتی |
https://ijcce.ac.ir/article_709205_3ad31a59ea4b6d9df7db4619f2828f2e.pdf |
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| کد مقاله (doi) |
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| زبان مقاله منتشر شده |
en |
| موضوعات مقاله منتشر شده |
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