کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6593506 | 1423543 | 2018 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ignition studies of undiluted diethyl ether in a high-pressure shock tube
ترجمه فارسی عنوان
مطالعات احتراق دی اتیل نیتروژن در یک لوله شوک فشار بالا
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
The high ignitability of diethyl ether (DEE) reflected by a high cetane number of â¼125 leads often to unintentional far-endwall ignitions in shock tubes. This is the main reason why exclusively diluted DEE experiments with attenuated reactivity can be found in the literature. The current work deals with the ignition behavior of undiluted DEE/air mixtures at engine relevant conditions. The experiments are conducted in a high-pressure shock tube (HPST) under stoichiometric conditions comprising pressures of 18 and 40â¯bar and temperatures from 646 to 1058â¯K and 622 to 1100â¯K, respectively. A recently published detailed kinetic mechanism is employed for kinetic analyses and evaluation purposes. Comprehensive kinetic studies have shown that the oxidation process of DEE behind incident shock waves can proceed significantly leading even to weak and strong far-endwall ignitions. With the aid of x-t-diagrams, each influenced experiment by far-endwall ignitions could be identified and excluded from the dataset. The valid sets of data capture the ignition trend from low to high temperatures including the negative temperature coefficient region (NTC). A new oblique scaling method is introduced together with derived formulae, which enable the scaling of experimental data in the NTC region. The experimental ignition trend at both pressures and the overall ignition delay times at 18â¯bar are well described by the mechanism, whereas shorter ignition delays are predicted at 40â¯bar.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Combustion and Flame - Volume 194, August 2018, Pages 396-409
Journal: Combustion and Flame - Volume 194, August 2018, Pages 396-409
نویسندگان
Yasar Uygun,