کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7053851 | 1458013 | 2018 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Numerical study of steam condensation inside a long, inclined, smooth tube at different saturation temperatures
ترجمه فارسی عنوان
مطالعه عددی تراکم بخار در داخل یک لوله طولانی، شیب دار و صاف در دماهای مختلف اشباع
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کلمات کلیدی
تراکم بخار، زاویه گشتاور، حجم سیالات، ضریب انتقال حرارت،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
In this study, the effects of the inclination angle on the heat transfer coefficients and on pressure drops were investigated numerically, during the process of development of heat condensation inside a long smooth tube, at different saturation temperatures. The simulation model included a smooth tube with a diameter of 18â¯mm and a length of 7.2â¯m. The imposed inclinations varied between â60° (downward flow) to +60° (upward flow). Moreover, the saturation temperatures varied between 40â¯Â°C and 70â¯Â°C. The flow field was assumed to be three-dimensional, unsteady, and turbulent. The Volume of Fluid (VOF) multiphase flow method was utilised to solve the governing equations comprising mass, momentum, energy, and turbulence equations, along with phase change rates. The simulation results were in good agreement with the experimental data. The results showed that the condensation heat transfer coefficient first increased and then decreased along the length of the tube. Furthermore, it was noted that the condensation heat transfer coefficient and pressure drop decreased when the steam saturation temperature increased.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 126, Part B, November 2018, Pages 15-25
Journal: International Journal of Heat and Mass Transfer - Volume 126, Part B, November 2018, Pages 15-25
نویسندگان
S.M.A. Noori Rahim Abadi, M. Mehrabi, Josua P. Meyer,