کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
652653 885035 2008 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental and numerical study of mixed convection with flow reversal in coaxial double-duct heat exchangers
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Experimental and numerical study of mixed convection with flow reversal in coaxial double-duct heat exchangers
چکیده انگلیسی

Velocity vectors in a vertical coaxial double-duct heat exchanger for parallel ascending flow of water under conditions of laminar mixed convection have been determined experimentally using the particle image velocimetry technique. The measured velocity distributions for large annular flow rates, resulting in an essentially isothermal environment for the stream in the inner tube, are in very good agreement with corresponding numerical predictions. For flow rates of the same order of magnitude in the inner tube and the annulus, and corresponding temperature differences of about 20 °C, experimental observations show that flow reversal occurs simultaneously in both streams over large axial distances for both heating and cooling of the flow in the inner tube.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Experimental Thermal and Fluid Science - Volume 32, Issue 5, April 2008, Pages 1096–1104
نویسندگان
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