بررسی اثر مکان شعله بر دمای شعله در احتراق ابر ذرات جریان پیش‌مخلوط متقابل

نوع مقاله : Short Paper

نویسندگان

دانشگاه علم و صنعت ایران

چکیده

در این بررسی تحلیلی، انتشار شعله میان ابر ذرات یک جریان متقابل پیش مخلوط همگن دو جزئی، متشکل از ذرات سوخت و هوا مطالعه خواهد شد. این مطالعه در چارچوب یک مدل نفوذی حرارتی با فرض عدد لوییس واحد و نرخ کرنش ثابت است. پروفیل سرعت تابعی از یک متغیر مانند x فرض شده است. ساختار شعله به سه ناحیۀ پیش گرم-تبخیر، نازک حدی واکنش و پس از واکنش تقسیم می شود. عدد زلدویچ بزرگ انتخاب شده و از اتلاف های حرارتی صرف نظر شده است. این آنالیز تغییرات دمای شعله براساس مکان شعله را نتیجه می‌دهد. پروفیل دما برای نرخ کرنش های متفاوت در جریان متقابل ابر ذرات نیز موجود است که این نتایج با دیدگاه های تجربی و عددی احتراق ذرات موافقت دارد.

کلیدواژه‌ها

عنوان مقاله [English]

Investigation of Flame Location Effect on Flame Temperature in Premixed Counterflow Combustion of Particle-Cloud

نویسندگان [English]

  • M. Bidabadi
  • A. Esmaeilnejad
  • Y. Pourmohammad
Iran University of Science and Technology
چکیده [English]

The premixed counterflow flames propagation in combustion of mixture which is a uniform mixture of fuel particles and air is analytically studied. This analysis framework is based on thermal-diffusion model with assumption that the Lewis number is unit and the strain rate is constant. Velocity profile is assumed as a function of one variable like x. The structure of the flame is presumed to consist of three zones: preheat-vaporization zone, reaction zone and convection zone. The Zeldovich number, based on the gas-phase oxidation of the gaseous fuel is large, and heat loss is neglected. This analysis leads to variation of the flame temperature based on the flame location. Temperature profiles for different strain rates are also available, which is congruent with experimental and numerical standpoints of particles combustion.

کلیدواژه‌ها [English]

  • Particle-Cloud
  • Counterflow
  • Combustion
  • Flame Location
  • Flame Temperature

مراجع

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