کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10264444 | 457886 | 2005 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
An experimental and modeling study of iso-octane ignition delay times under homogeneous charge compression ignition conditions
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: An experimental and modeling study of iso-octane ignition delay times under homogeneous charge compression ignition conditions An experimental and modeling study of iso-octane ignition delay times under homogeneous charge compression ignition conditions](/preview/png/10264444.png)
چکیده انگلیسی
Autoignition of iso-octane was examined using a rapid compression facility (RCF) with iso-octane, oxygen, nitrogen, and argon mixtures. The effects of typical homogeneous charge compression ignition (HCCI) conditions on the iso-octane ignition characteristics were studied. Experimental results for ignition delay times, Ïign, were obtained from pressure time-histories. The experiments were conducted over a range of equivalence ratios (Ï=0.25-1.0), pressures (P=5.12-23atm), temperatures (T=943-1027K), and oxygen mole fractions (ÏO2=9-21%), and with the addition of trace amounts of combustion product gases (CO2 and H2O). It was found that the ignition delay times were well represented by the expression Ïign=1.3Ã10â4Pâ1.05Ïâ0.77ÏO2â1.41exp(33,700/R(cal/mol/K)T), where P is pressure (atm), T is temperature (K), Ï is the equivalence ratio (based on iso-octane to O2 molar ratios), ÏO2 is the oxygen mole percent (%), and Ïign is the ignition delay time (ms). Carbon dioxide was found to have no chemical effect on Ïign. Water was found to systematically decrease Ïign by a small amount (less than 14% for the range of conditions studied). The maximum uncertainty in the measured Ïign is ±12% with an average uncertainty of ±6%. The performance of several proposed chemical reaction mechanisms (including detailed, reduced, and skeletal mechanisms) was evaluated in the context of the current experimental results.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Combustion and Flame - Volume 142, Issue 3, August 2005, Pages 266-275
Journal: Combustion and Flame - Volume 142, Issue 3, August 2005, Pages 266-275
نویسندگان
X. He, M.T. Donovan, B.T. Zigler, T.R. Palmer, S.M. Walton, M.S. Wooldridge, A. Atreya,