مجله مهندسی مکانیک

مجله مهندسی مکانیک

ارائه‌ یک مکانیزم کاهش یافته‌ جدید برای اکسیداسیون متان

نوع مقاله : علمی پژوهشی

نویسندگان
1 استادیار، گروه مهندسی مکانیک، دانشکده مهندسی، دانشگاه بزرگمهر قائنات، قائن
2 استادیار، گروه مهندسی مکانیک، دانشکده مکانیک و عمران، دانشگاه صنعتی اسفراین، اسفراین
چکیده
یکی از مشکلات مهم در زمینه‌ شبیه ‌سازی‌ فرایندهای احتراقی، بزرگ بودن مکانیزم ‌های واکنش می ‌باشد. به همین دلیل همواره محققان بر آن بوده ‌اند تا برای صرفه ‌جویی در زمان، مکانیزم‌ های واکنش را کاهش داده و از تعداد واکنش‌ ها و گونه ‌های آن بکاهند. هدف اصلی در این پژوهش ارائه‌ یک مکانیزم کاهش یافته برای اکسیداسیون متان است. شبیه ‌سازی احتراق به کمک مدل شعله نفوذی و کاهش مکانیزم به روش آنالیز حساسیت و آنالیز جریان واکنش در نرم افزار شبیه ساز احتراق کمکین انجام شده است. در آنالیز حساسیت، واکنش ‌هایی که در ارتباط با همه‌ گونه‌ ها دارای حساسیت پایینی هستند، حذف می ‌شوند. در آنالیز جریان واکنش، واکنش‌ هایی که سهم کمی در تولید گونه ‌ها دارند یا شدت آن از حد خاصی کمتر است، حذف می ‌گردند. مکانیزم پیشنهادی پژوهش حاضر دارای 123 واکنش و 33 گونه از 6 عنصر است. در حالی که مکانیزم کلی اولیه دارای 1359 واکنش و 230 گونه از 6 عنصر می ‌باشد. نتایج نشان می ‌دهد که مکانیزم کاهش یافته‌ پیشنهادی تطابق خوبی با نتایج آزمایشگاهی و عددی سایر محققان دارد و بر خلاف مکانیزم ‌های پیشنهادی سایر محققان، در گستره‌ وسیعی از دما و فشار کارایی دارد. مقایسه نتایج مختلف در پژوهش حاضر، حداکثر خطای نسبی میان مکانیزم‌ های کامل و کاهش یافته را در حدود 7/0 درصد نشان می ‌دهد.
کلیدواژه‌ها

موضوعات


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دوره 34، شماره 1 - شماره پیاپی 160
فروردین و اردیبهشت 1404
صفحه 3-13

  • تاریخ دریافت 14 مرداد 1403
  • تاریخ بازنگری 18 مهر 1403
  • تاریخ پذیرش 02 آبان 1403