کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
653223 1457498 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Measurement of the void fraction of R-134a flowing through a horizontal tube
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Measurement of the void fraction of R-134a flowing through a horizontal tube
چکیده انگلیسی

This experiment aims to measure the void fraction of R-134a refrigerant flowing through a horizontal tube, using a quick-closing valve and optical observation techniques. The tube is transparent, circular, 115 mm long with an inside 8 mm thick, and has two actuator ball valves installed at both ends. The experiment was conducted in conditions where vapor quality ranged from 1% to 82%, saturated temperature was from 23 to 30 °C, and mass flux was from 644 to 1455 kg/m2 s. The results of the experiment indicate that raising the saturated temperature decreased the void fraction, whereas increasing mass flux had no significant effect on it. Moreover, results also show three flow regimes: intermittent, wavy, and annular. Each flow regime led to different predicted void fractions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Communications in Heat and Mass Transfer - Volume 56, August 2014, Pages 8–14
نویسندگان
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