کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4995043 1458489 2017 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Low-pressure twin-fluid atomization: Effect of mixing process on spray formation
ترجمه فارسی عنوان
اتمیزاسیون دوقلوی فشار کم: اثر فرآیند مخلوط شدن بر تشکیل اسپری
کلمات کلیدی
فشار کم، اتمسفر، مایع دوقلو، پویایی قطره، تجزیه مایع، روشنایی برگشت
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
The present work comparably examines four different twin-fluid atomizers operated under the same operating conditions. Spray formation was examined by several approaches. The internal flow pattern was estimated using a simplified analytical approach, and the results were supported by the observation of the liquid discharge in the near-nozzle region. A high-speed back illumination was used for visualisation of the primary breakup. In the region of fully developed spray, the dynamics of droplets was studied using a phase-Doppler analyser (PDA). The information obtained from all methods was then correlated. Results show that the spray formation process depends mainly on the internal design of twin-fluid atomizer at low gas to liquid ratios (GLR). The amount of gas influences the character of the internal two-phase flow, a mechanism of the liquid breakup, droplet dynamics and a resulting drop size distribution. Differences among the atomizers are reduced with the increase in GLR. Moreover, it was shown that a certain mixing process can inherently create the annular internal flow which generates a stable spray characterized by relatively low mean droplet size.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Multiphase Flow - Volume 89, March 2017, Pages 277-289
نویسندگان
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