کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4994058 1458030 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Modeling of temperature instabilities during condensation of R134a refirgerant in pipe minichannels
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Modeling of temperature instabilities during condensation of R134a refirgerant in pipe minichannels
چکیده انگلیسی
The propagation velocity of temperature instabilities is directly connected with the displacement of the so-called condensation front. This phenomenon was defined as a displacement of an area with a negligently small thickness that separates condensing vapour in a two-phase mixture from the liquid zone of the subcooled condensate. In the case of a phase change of condensation realized in established conditions, the condensation front displaces in the opposite direction to the vapour incoming to the channel. As a result of hydrodynamic or hydrostatic interactions, the displacement direction of the condensation front depends of whether we deal with the process of the development or decay of the condensation phase change. The present study contains a proposal concerning modeling of the propagation velocity of the condensation front in pipe minichannels for the R134a refrigerant in the conditions of the interactions of hydrodynamic instabilities. The diameters examined of minichannels were D = 0.64; 0.90; 1.40; 1.44; 1.92; 2.30 and 3.30 mm.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 111, August 2017, Pages 83-93
نویسندگان
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