بررسی عددی حرکت قطره آب درون کانال کاتد پیل سوختی غشا پلیمری همراه با مسدودسازی عرضی کانال جریان

نوع مقاله : ترویجی

نویسندگان

1 استادیار مهندسی مکانیک، پژوهشگاه صنعت نفت، تهران

2 دانش‌آموخته کارشناسی ارشد، مهندسی مکانیک دانشگاه آزاد اسلامی، واحد تهران غرب، تهران

3 دانشجو کارشناسی ارشد مهندس مکانیک، دانشگاه علم و صنعت ایران، تهران

چکیده

در این مقاله حرکت قطره آب درون کانال گاز کاتد پیل سوختی غشاء پلیمری همراه با مسدودسازی عرضی کانال به‌صورت عددی، دوفازی و دوبعدی بررسی می­شود. 24 هندسه مختلف برای مانع مطالعه و اثر تغییرات طول مانع (Wr) و موقعیت قرار گرفتن آن در عرض کانال (λ)، بر روی کانتورهای سرعت و فشار، شکل خطوط جریان و تغییر شکل قطره بررسی‌شده‌اند و زمان تخلیه قطره، افت فشار لحظه­ای، افت فشار متوسط و نسبت پوشش آب لحظه­ای و متوسط محاسبه گردیده‌اند. نتایج نشان می‌دهند که در بعضی از هندسه‌ها کانال دچار انسداد و گرفتگی می­شود و در سایر حالات که قطره از مانع عبور می­کند قرار دادن مانع باعث کاهش زمان تخلیه و افزایش افت فشار لحظه­ای و متوسط و نسبت پوشش آب می­گردد. بر اساس نتایج به‌دست‌آمده، بیشترین کاهش زمان تخلیه (در صورت عدم محدودیت در تأمین فشار) برای حالت 1/66=Wr و 0/3=λ است. همچنین کمترین افت فشار لحظه‌ای و نسبت پوشش آب برای حالت 0/66=Wrو 0/3=λ اتفاق می‌افتد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Numerical Investigation of Water Droplet Flow in the Cathode Channel of a PEM Fuel Cell with Transversal Blocked Flow Channel

نویسندگان [English]

  • Mohammad Mazidi Sharfabadi 1
  • Arash Parsanezhad 2
  • ali golam valoujerdi 3
1 Professor Assistant, Research Institute for Development and Optimization of Energy Technologies, Research Institute of Petroleum Industry, Tehran
2 MS, Department of Mechanical Engineering, Islamic Azad University, West Tehran Branch, Tehran
3 MS Student, School of Mechanical Engineering, Iran University of Science and Technology, Tehran
چکیده [English]

In this paper, the motion of water droplets inside a cathode gas channel of a polymer membrane fuel cell with transverse channel blocking is investigated numerically, biphasically, and two-dimensionally.24 different blocked geometries are studied and the effect of the different block length (Wr) and the position of the block across the channel (λ) upon velocity and pressure contours, the shape of streamlines and droplet deformation is investigated and droplet discharge time, instant pressure drop, mean pressure drop, and instant and mean water coverage ratio are calculated. The results show that the channel becomes blocked and clogged for some geometries and in other cases where the droplet crosses the barrier, the discharge time decreases and the instant and average pressure drop and water coverage ratio increase by placing the barrier. According to the obtained results, the greatest decrease in discharge time (if there is no restriction in pressure supply) is for Wr=1.66 and λ=0.3. Also, the lowest instant pressure drop and water coverage ratio occur for Wr=0.66 and λ=0.3.

کلیدواژه‌ها [English]

  • Polymer Membrane Fuel Cell
  • Cathode Channel
  • Channel Block
  • Pressure Drop
  • Coverage Ratio
  • Water Management
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