مدل‌سازی تحلیلی احتراق جریان متقابل نفوذی ابرذرات

نوع مقاله : مقاله پژوهشی

نویسندگان

دانشگاه علم و صنعت

چکیده

در این پژوهش، مدل‌سازی احتراق جریان متقابل ابرذرات نفوذی مورد بررسی قرار گرفت. مدل ارائه‌شده مبتنی بر این فرض است که ذرات سوخت ابتدا تبخیر می‌شوند تا سوخت گازی را برای ورود به واکنش با اکساینده تولید نمایند. واکنش صورت‌گرفتۀ مفروض، از قانون آرنیوس پیروی می‌کند. معادلات بقا به‌صورت تحلیلی حل شدند و دمای شعله برحسب تغییرات اعداد لوئیس سوخت و اکساینده ارائه شد. هم‌چنین روند تغییر موقعیت شعله با تغییر اعداد لوئیس مورد ارزیابی قرار گرفت و مشخص شد که دمای شعله با افزایش اعداد لوئیس سوخت و اکساینده، کاهش می‌یابد به‌طوری‌که با افزایش عدد لوئیس سوخت از 1/0 تا 4/1، دمای شعله ‌دریج از 1943 به 1473 درجۀ کلوین کاهش می‌‌یابد.

کلیدواژه‌ها

عنوان مقاله [English]

Analytical Modeling of a Counterflow Diffusion Flame of a Dust Cloud

نویسندگان [English]

  • Mehdi Bidabadi
  • Milad Ramezanpour
  • Alireza Khoeini Poorfar
Iran University of Science and Technology
چکیده [English]

Diffusion Flame in a Dust cloud combustion in a Counterflow configuration is investigated in this research. It is presumed that the fuel particles vaporize first to yield a gaseous fuel to oxidize with the gas phase. The reaction rate is assumed to be of the Arrhenius type. Conservation equations for the non-unity Lewis number are solved and the flame temperature with the variations of different Lewis numbers of fuel and oxidizer is proposed. Furthermore, the variations of flame position with the variation of Lewis number are evaluated. It has been found that the flame temperature decreases with increasing of fuel and oxidizer Lewis numbers, which for rise of fuel Lewis number from 0.1 to1.4, the flame temperature decreases from 1943 to 1473K.

کلیدواژه‌ها [English]

  • Dust Cloud Combustion
  • Counterflow
  • Diffusion Flame
  • Analytical Solution

مراجع

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