کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7058873 1458078 2013 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Comparison of models for predicting band emissivity of carbon dioxide and water vapour at high temperatures
ترجمه فارسی عنوان
مقایسه مدل ها برای پیش بینی میزان انتشار دی اکسید کربن و بخار آب در دماهای بالا
کلمات کلیدی
فرکانس طیفی، اشعه باند، دی اکسید کربن، بخار آب، درجه حرارت بالا،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
A comparison of different models for predicting band emissivity of CO2 and H2O at temperatures up to 1550 K is presented. The calculations do not contain line-by-line databases only; a narrow-band as well as a wide-band model are also included. The main objective of this work is in comparing the spectral transmissivity and band emissivity values obtained from line-by-line calculations using the most recent HITEMP-2010 as well as CDSD-1000 spectral database with measured data. Differences between the previous HITEMP-2004 and the HITEMP-2010 spectral databases are depicted. The measurements are also compared with a narrow-band model as well as a wide-band model because both have frequently been used in heat transfer calculations. It is demonstrated that line-by-line calculations show high accuracy when computing CO2 transmissivities but inaccuracies still remain in case of H2O at temperatures above 1000 K. The narrow-band model as well as the wide-band model show larger discrepancies if compared to the line-by-line predictions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 64, September 2013, Pages 910-925
نویسندگان
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