کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10151950 1666144 2018 22 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental investigation of condensation flows in circular cross-section channel
ترجمه فارسی عنوان
بررسی تجربی جریان های تراکم در کانال مقطع دایره ای
کلمات کلیدی
تراکم سازگار، کانال مقطع دایره ای، رژیمهای جریان، ضریب انتقال حرارت، افت فشار، آزمایش
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
In this work, condensation flows of pure ethanol in a horizontal water-cooled circular cross-section heat exchanger were investigated for a mass velocity ranging between 30 and 100 kg m−2 s−1. The inner channel of condensation has inner and outer diameters of 4 mm and 10 mm, respectively, with a heat exchange length of 1020 mm. An adiabatic section consisted of a transparent circular cross-section channel, of 4 mm inner diameter and of 130 mm visible length, was placed downstream of the condenser in order to visualise the condensation flows by shadowgraph technique. Two main flow regimes were identified: the wavy-stratified regime and the wavy-annular regime. A flow regime map was developed and compared with flow regime maps available in the literature. Besides, the local vapour quality and internal heat transfer coefficient were determined and compared with prediction models of the literature. Finally, the total pressure drop in the condenser was determined.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 145, 25 December 2018, Pages 147-154
نویسندگان
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