مطالعه تجربی فرآیند تأثیرگذاری پلاسما بر مشخصات عملکردی شعله­ های ایستا و متحرک

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری، دانشگاه امام حسین،تهران، ایران

2 دانشیار، دانشگاه تهران، تهران، ایران

چکیده

بهبود فرایند احتراق از دیرباز به عنوان یکی از مهمترین فرایندهای دخیل در تولید انرژی مورد نیاز انواع سیستم‌ها مورد توجه بوده است. استفاده از ابزار پلاسمایی به عنوان راهکار نوین برای افزایش بازده و ایجاد قابلیت عملکرد سیستم‌های اشتعالی در شرایط کاری وسیع‌تر در سالیان اخیر مورد توجه قرار گرفته است. در این تحقیق تأثیرات سیستم پلاسما پایه بر مشخصه‌های عملکردی فرایند احتراق به صورت تجربی بررسی شده است. برای این منظور از دو پیکربندی آزمایشگاهی استفاده شده است. در ساختار اول از مشعل بونزن به دو صورت باز و محصور برای مطالعه خواص شعله ساکن پیش آمیخته استفاده شده است. در این ساختار تحلیل نتایج بر اساس تصویر برداری اپتیکی به روش شیلرن و مشاهده پایداری و مخروط شعله تشکیل شده صورت گرفته است. در ساختار دوم از محفظه حجم ثابت برای مطالعه خواص شعله متحرک در محیط اشتعال‌پذیر استفاده شده است. در این مطالعه تفسیر نتایج بر اساس تصویر برداری فوق سریع به روش شیلرن از شعله شکل گرفته درون محفظه و همچنین داده‌های فشار درون محفظه حین احتراق استفاده شده است. نتایج گویای بهبود مشخصات شعله شامل سرعت آرام شعله و پایداری آن بر اساس مشاهدات شعله باز می‌باشد. همچنین کاهش زمان توسعه اولیه شعله و افزایش ناحیه اشتعال پذیری مخلوط تحت تأثیر محیط پلاسمایی، از نتایج حاصل از تست محفظه حجم بسته می‌باشد.

کلیدواژه‌ها


عنوان مقاله [English]

Experimental Study of Plasma Effects on the Stagnated and Propagating Flames Properties

نویسندگان [English]

  • Goudarzi Amir 1
  • Afshari Asghar 2
1 PhD student, Imam Hossein University, Tehran, Iran
2 Associate Professor, University of Tehran, Tehran, Iran
چکیده [English]

Combustion process improvement as one of the most important factors in the energy supplement for different devices has attracted great attention. Recently the concept of plasma assisted combustion as a new approach to increase efficiency and reliability of combustion based systems in the different working conditions has considered. In the present paper, two different experimental setups are used to investigate plasma system effects on the operational characteristics of combustion process. At the first setup, open and confined Bunsen burner is used to study premixed stagnated flame. In this structure flame properties are measured by optical schlieren photography method based on generation and stability of the flame cone. At the second setup, constant volume chamber is used to analyze propagating flame in combustible environment. In this structure high speed schlieren photography from propagating flame front and high frequency pressure measurement is used to study premixed propagating flame. Results indicate that, in the open stagnated flame plasma effects improve the laminar flame speed, in the confined stagnated flame plasma effects improve the flame stability and in the propagating flame plasma effects reduce the ignition delay, develop the lean flammability limit and increase laminar flame speed.

کلیدواژه‌ها [English]

  • plasma assisted combustion
  • optical schlieren photography
  • experimental analysis
  • laminar flame speed
  • flame stability
  • flammability limit

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دوره 12، شماره 1 - شماره پیاپی 31
بهار و تابستان 1402
شهریور 1402
صفحه 75-96
  • تاریخ دریافت: 18 اسفند 1401
  • تاریخ بازنگری: 25 تیر 1402
  • تاریخ پذیرش: 08 مرداد 1402
  • تاریخ انتشار: 03 شهریور 1402