کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
269744 504698 2015 17 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A database of narrow-band parameters for fuels commonly encountered in fire applications
ترجمه فارسی عنوان
یک پایگاه داده از پارامترهای باند باریک برای سوخت های معمولی در برنامه های آتش نشانی
کلمات کلیدی
سوخت، اندازه گیری تصاویر با وضوح متوسط، مدل مولکموس، پایگاه داده باریک، توزیعهای باند باریک، پایگاه داده طیفی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی


• Generation of a database of narrow band parameters for nine fuels.
• Generation of a database of narrow band k-distributions for nine fuels.
• Evaluation of the database by comparison with experimental data.
• Evaluation of HITRAN 2008 and EM2C databases by comparison with experimental data.
• Application to pool fires.

The objective of this paper is to derive narrow band (NB) parameters for the Malkmus statistical narrow band model from the medium resolution transmission measurements carried out at NIST (Wakatsuki et al., Proc. Combust. Inst., vol. 31, 2007, pp. 2573–2580) up to about 1000 K for nine fuels commonly encountered in fire applications, namely methane, methanol, ethane, ethylene, propane, propylene, heptane, methyl methacrylate and toluene. These NB parameters can be used to generate a database of NB k-distributions of these fuels in order to apply the k-distribution methods to model their contributions to radiative heat transfer. The accuracy of this NB database, the EM2C NB database for methane (Perrin and Soufiani, JQSRT, vol. 103, 2007, pp. 3–13), and HITRAN 2012 for methane, methanol, ethane, and ethylene is assessed by comparison with the measured medium resolution transmissivities and spectrally-integrated radiative properties. Results show that the EM2C database is the most accurate for methane over the entire range of the temperature and the fuel partial pressure path length considered. The line parameters in HITRAN 2012 are not available for some important bands of methanol, ethane and ethylene and this spectroscopic database cannot be used with confidence above 600 K. The Malkmus narrow band database derived in the present study is found to reproduce spectrally-integrated radiative properties with error less than 20%, which suggests that it can be used for engineering applications. Finally, applications to radiation calculations along lines of sight with methane concentrations and temperatures representative of pool fires show that both the present Malkmus narrow band and the NIST databases can predict accurately the radiative intensity for small scale pool fires where as discrepancies of the order of 30% are expected in the case of methane pool fires with a heat release rate of 176 kW.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fire Safety Journal - Volume 78, November 2015, Pages 202–218
نویسندگان
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