مهندسی مکانیک مدرس

مهندسی مکانیک مدرس

مطالعه سینتیکی و ترمودینامیکی مشخصات احتراقی ترکیب سوخت آمونیاک با گاز زباله در فشارهای افزایش یافته

نوع مقاله : پژوهشی اصیل

نویسندگان
مهرداد کیانی 1
علی اکبر عباسیان آرانی 1
احسان هوشفر 2
مهدی اشجعی 2
1 دانشگاه کاشان
2 دانشگاه تهران
10.22034/MME.24.3.153
چکیده
توجه و علاقه زیاد پژوهشگران برای استفاده از آمونیاک در سیستم‌های احتراقی به‌عنوان سوختی بدون کربن برای توربین‌های گازی و همچنین وجود زیرساخت‌های توسعه‌یافته برای تولید آن نشان از اهمیت این نوع از سوخت و این موضوع است. بعلاوه یکی از بهترین کاندیداها برای ذخیره کردن انرژی‌های تجدید پذیر در مقیاس‌های بزرگ یا حمل­های با فواصل زیاد، بدون شک می­تواند آمونیاک باشد. در توربین‌های گازی و بویلرها، افزودن گازهای زباله می­تواند واکنش‌پذیری آمونیاک را به طرز مؤثری بهبود ‌بخشد. در این مطالعه، شاخصه-های احتراقی مخلوط‌ آمونیاک/گاز زباله/هوا بین فشار 1 تا 10 اتمسفر را درون یک محفظه احتراق با حجم ثابت 11 لیتر با استفاده از روش­های آزمایشگاهی اینترفرومتری ماخ-زندر و شلیرن موردبررسی قرارگرفته است. بخش عددی این مطالعه با استفاده از نرم‌افزار کمکین - پرو از پکیج انسیس از طریق مکانیسم‌های سن دیگو، اکافور و مکانیزم جی آر آی 3 و انجام‌شده است که قادر به پیش‌بینی دقیقی از سرعت‌های شعله هستند. نتایج به‌دست‌آمده نشان می‌دهند که بیشترین تأثیر بر روی سرعت شعله ناشی از تغییر در غلظت آمونیاک موجود در مخلوط می­­باشد. همچنین، به این نتیجه رسیده شد که سرعت شعله با افزایش فشار به‌تدریج کاهش می‌یابد.
کلیدواژه‌ها
سرعت شعله آرام
گاز زباله
مدل سینتیکی
فشار افزایش یافته

موضوعات

عنوان مقاله English

Kinetic and Thermodynamic Study of the Combustion Characteristics of the Combination of Ammonia Fuel with Waste Gas at Elevated Pressures

نویسندگان English

Mehrdad Kiani 1
Ali Akbar Abbasian Arani 1
Ehsan Houshfar 2
Mehdi Ashjaee 2
1 University of Kashan
2 University of Tehran
چکیده English

The great attention and interest of researchers to use ammonia in combustion systems as a carbon-free fuel for gas turbines, as well as the existence of developed infrastructure for its production, show the importance of present fuel and this issue. In addition, one of the best candidates for storing renewable energies on large scales or transporting them for long distances is doubtlessly Ammonia (NH3). In gas turbines and boilers, adding landfill gas improve NH3 reactivity effectively. The present effort studies NH3/landfill mixtures’ laminar flame propagation from 1 to 10 atm in an 11-liter constant volume combustion chamber using experimental approaches such as Mach-Zehnder and Schlieren interferometry method. The numerical study was performed using the Ansys Chemkin-Pro package via San Diego, Okafor, and GRI-Mech 3.0 mechanisms which can provide very accurate predictions for laminar burning velocities. The results indicated that the most considerable influence on increasing laminar burning velocities could be attributed to Ammonia concentration in the mixture. The experiments also showed that laminar burning velocity is reduced when the pressure is increased.

کلیدواژه‌ها English

Laminar burning velocity
Landfill gas (LFG)
Kinetic model
Elevated pressure
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مهندسی مکانیک مدرس
دوره 24، شماره 3
اسفند 1402
صفحه 153-164