کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4994386 1458033 2017 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The mechanism of bubbly to slug flow regime transition in air-water two phase flow: A new transition criterion
ترجمه فارسی عنوان
مکانیزم جابجایی حباب به رژیم جریان شتاب در جریان دو فاز هوا-آب: یک معیار انتقال جدید
کلمات کلیدی
رژیم جریان، جریان حباب، نسبت سرعت، سرعت شامپانی، معیارهای انتقال تئوری،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
Air-water two-phase upward flow experiments are conducted in a tubular test section with the inner diameter of 25.4 mm in order to investigate the transition mechanism of bubbly flow to slug flow. Flow regime identification is carried out by using ReliefF-FCM clustering algorithm, i.e., a new objective flow regime identification method. It is found that the velocity ratio decreases with the increase of superficial gas velocity in bubbly flow at the constant liquid superficial velocity. And the velocity ratio always reaches its minimum during the flow regime transition. The present research finds that the changes of bubble size and shape may result in the decrease of velocity ratio in bubbly flow. From this point of view, a new mechanism for bubbly to slug flow regime transition has been proposed. A transition criterion based on the mechanism is also built. The comparison of the transition criterion with the experimental results at different flow conditions is carried out. Although the transition criterion is empirically modified based on the present experimental data, it shows the reasonable agreements.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 108, Part B, May 2017, Pages 1579-1590
نویسندگان
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