کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7052272 1457411 2015 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental studies on heat transfer to supercritical water in circular tubes at high heat fluxes
ترجمه فارسی عنوان
مطالعات تجربی در مورد انتقال حرارت به آب فوق بحرانی در لوله های دایره ای در شار حرارت بالا
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
Experimental studies on heat transfer to supercritical water flowing upward in circular tubes are carried out at the SWAMUP test facility. Totally more than 10,000 test data were obtained in tubes of two different inner diameters, i.e. 10.0 mm and 7.6 mm with the following test conditions: pressure from 23.0 MPa to 26.0 MPa, mass flux from 450 kg/m2 s to 1500 kg/m2 s, heat flux from 190 kW/m2 to 1400 kW/m2 and bulk temperature from 240 °C to 460 °C. Each test point is accompanied with systematic error analysis. It is found that for 90% of the test data the uncertainty of measured Nusselt number is less than 10%. Based on the test data obtained, the effect of various parameters on heat transfer is investigated, such pressure, mass flux, heat flux and tube diameter. In addition, the importance of several dimensionless numbers and the accuracy of five widely applied heat transfer correlations are assessed. It is concluded that the acceleration number πA and the buoyancy parameter πB show unique effect on heat transfer coefficient. Among the five selected heat transfer correlations, the correlation of Cheng et al. and Jackson show the best agreement with the present test data.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Experimental Thermal and Fluid Science - Volume 65, July 2015, Pages 22-32
نویسندگان
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