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
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
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 DÂ =Â 0.64; 0.90; 1.40; 1.44; 1.92; 2.30 and 3.30Â mm.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 111, August 2017, Pages 83-93
Journal: International Journal of Heat and Mass Transfer - Volume 111, August 2017, Pages 83-93
نویسندگان
Waldemar KuczyÅski, Henryk Charun, Tadeusz Bohdal,