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Flow and Thermal Analyses for the Optimal Specification of Flat Tube at Radiator
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 Title & Authors
Flow and Thermal Analyses for the Optimal Specification of Flat Tube at Radiator
Park, Kyoung-Woo; Pak, Hi-Yong;
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The flow and thermal phenomena in flat tubes of radiator are analyzed numerically. To predict the characteristics of heat transfer and pressure drop, the flow analysis program for three-dimensional complex geometry is developed, which adopted an non-staggered grid system and Cartesian velocities as dependent variables of the momentum equations. Using the developed program, the effect of tube specifications on the heat transfer characteristics is investigated for various flat tubes. From this study, the following results are obtained; (1) For the same hydraulic diameter(mm), the Nusselt numbers of three basic modeis(D, J, and H-model) are 8.71, 8.92, and 10.58, respectively, and the pressure drops of D-, J-, and H-model are predicted as Pa, (2) In case of the same flat tube specification, the fins must be brazed at upper tube surface because the heat is more vividly transferred. Therefore, it is found that the H- model is the most effective tube as a heat exchanger and these results are used as a fundamental data for the design of tube.
Radiator;Flat Tube;Three Dimensional Complex Geometry;Numerical Analysis;Heat Transfer;Pressure Drop;
 Cited by
임의형상을 갖는 납작관에서의 혼합대류 열전달 해석,박희용;박경우;이상철;

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