Study of Porous Particles Counterflow Diffusion Flames Considering Heat Loss Effect

سال انتشار: 1397
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 498

فایل این مقاله در 14 صفحه با فرمت PDF قابل دریافت می باشد

استخراج به نرم افزارهای پژوهشی:

لینک ثابت به این مقاله:

شناسه ملی سند علمی:

ENGCONF02_098

تاریخ نمایه سازی: 1 تیر 1398

چکیده مقاله:

In this paper, heat loss effects on counterflow, non-premixed combustion of porous particles is investigated. Considering heat loss term in the equations of porous particles combustion leads to a change in temperature distribution in counterflow combustion of organic particles which creates non-adiabatic flames. Volumetric heat loss has a significant influence on temperature distribution in counterflow combustion of porous particles. It is presumed that the flame structure consists of three zones including pre-heat, post-vaporization and post-flame zones. Vaporization and reaction processes are assumed to occur suddenly in thin fronts. Conservation equations are solved utilizing specific boundary conditions and considering particle porosity and thermal heat loss in each zone. Moreover, flame temperature and mass fractions of gaseous fuel and oxidizer are exhibited in terms of oxidizer and fuel Lewis numbers and compared in two cases of adiabatic and non-adiabatic flames. If heat loss coefficient grows, flame temperature declines continuously. As a result, increasing mass concentration of particles, reducing particles radius and porosity lead to a rise in the flame temperature

نویسندگان

Sasan Asiaei

School of Mechanical Engineering, Iran University of Science and Technology (IUST),Tehran, Iran,

Navid Malekian

School of Mechanical Engineering, Iran University of Science and Technology (IUST),Tehran, Iran,

Hesam Moghadasi

School of Mechanical Engineering, Iran University of Science and Technology (IUST),Tehran, Iran,

Faraz Gilanian Sadeghi

School of Mechanical Engineering, Iran University of Science and Technology (IUST),Tehran, Iran,