کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9951863 | 1429317 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Experimental study on single-phase frictional pressure drop for water flow under high heat fluxes
ترجمه فارسی عنوان
مطالعه تجربی در کاهش فشار اصطکاک تک فاز برای جریان آب تحت شار حرارت بالا
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
مهندسی انرژی و فناوری های برق
چکیده انگلیسی
Pressure drop is one basic issue for the heat-removal systems for high heat flux components, such as the ITER divertors in fusion reactors, in which an accurate knowledge of single-phase frictional pressure drop is fundamental for further calculation of two-phase frictional pressure drop. However, the single-phase frictional pressure drop is still not well examined under high heat fluxes. In this study, experiments were conducted on the single-phase frictional pressure drop of water flow in circular tubes within the range of qâ=â5-10âMW/m2, Gâ=â6000-10,000âkg/m2 s and pâ=â 3-5âMPa (typical operating parameters for water-cooled divertors). The data were correlated using the equation of f/fad =(μw/μb)m, in which m is an empirical exponent. It is found that the exponent m is affected by the length-to-diameter ratio of flow channel, while the effects of mass flux and heat flux are insignificant. In addition, a number of existing correlations for single-phase friction factor were compared with our data. The results indicate that these correlations cannot well capture part of the data. Therefore, a modified correlation is proposed to calculate the single-phase friction factor under high heat fluxes, in which the effect of length-to-diameter ratio is taken into account. The new correlation has an improved performance compared with the existing correlations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fusion Engineering and Design - Volume 137, December 2018, Pages 1-9
Journal: Fusion Engineering and Design - Volume 137, December 2018, Pages 1-9
نویسندگان
Pengcheng Guo, Junhui Wang, Jianguo Yan, Xingqi Luo, Qincheng Bi,