کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
646062 | 884553 | 2014 | 29 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Influence of wall ribs on the thermal stratification and self-pressurization in a cryogenic liquid tank
ترجمه فارسی عنوان
تأثیر دیواره های دیوار بر طبقه بندی حرارتی و خود فشار در یک مخزن مایع یخ زده
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کلمات کلیدی
مخزن ذخیره سازی مایع فریزر، دندانه دندانه، طبقه بندی حرارتی، افزایش فشار،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
Self-pressurization in a cylindrical ribbed tank which is partially filled with liquid hydrogen is investigated numerically under different rib spacing-to-height ratios. The Volume of Fluid (VOF) method is employed as well as a phase change model. Appropriate models are incorporated into the Ansys Fluent by the user-defined functions to carry out the computations. The ribbed surface is modeled as a finned surface and a conjugate transient heat transfer problem is formulated for predicting fluid flow currents and heat transfer. The effect of rib material and shapes is also studied. Numerical results indicate that the pressure rise can be reduced by ribs mounted on the tank wall. This phenomenon is more pronounced as the rib spacing-to-height ratio is reduced. A vortex is observed in the downstream region of each rib when the spacing-to-height has a relatively high value. Evaporation occurs as time elapses due to heat accumulation at the rib surfaces. Pressure starts to rise later with high thermal conductivity ribs and becomes higher with low thermal conductivity ribs when the ribs are of identical configuration in geometry. The final pressure rise seems to be monotonically versus increasing time. The semicircular ribs perform better than rectangular ones in control of the pressure rise and thermal stratification for identical cross sectional area and if the locations are kept the same.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 73, Issue 2, 22 December 2014, Pages 1421-1431
Journal: Applied Thermal Engineering - Volume 73, Issue 2, 22 December 2014, Pages 1421-1431
نویسندگان
Juan Fu, Bengt Sunden, Xiaoqian Chen,