کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7045936 1457096 2018 19 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Flow and heat transfer of supercritical water in the vertical helically-coiled tube under half-side heating condition
ترجمه فارسی عنوان
جریان و انتقال گرما از آب فوق بحرانی در لوله عمودی پیچ خورده تحت شرایط گرمایش نیمه جانبی
کلمات کلیدی
آب فوق بحرانی، لوله اسپلنیک، بخار نیمه جانبی، همبستگی انتقال حرارت،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
Flow and heat transfer of supercritical water in the vertical helically-coiled tube were investigated numerically using RNG k-ε model. The inner side of the coil was heated by constant heat flux and the outer side was adiabatic. Heat transfer performance under half-side heating is obtained and compared with that under uniform heating at the same heat transfer rate. Effect of specific heat, secondary flow velocity and buoyancy are discussed. The decrease of specific heat in the near-wall region, and the attenuated turbulence caused by the strong buoyancy force lead to a decrease in heat transfer for half-side heating. The deviations of heat transfer correlations on predicting half-side heating condition are evaluated, and a new heat transfer correlation for supercritical water in the vertical helically-coiled tube under inner half-side heating is proposed. The investigation into different statistical parameters shows that it is superior to the existing correlations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 133, 25 March 2018, Pages 512-519
نویسندگان
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