TED-AJ03-571 A NOVEL APPROACH FOR MODELING THE NONUNIFORM FLOW DISTRIBUTIONS IN TYPICAL CROSS-FLOW HEAT EXCHANGER INSTALLATIONS
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概要
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The classical ε-Ntu design equations for cross-flow heat exchangers are based on uniform flow entering the heat exchanger. In practice, however, cross-flow heat exchangers are often installed downstream of elbows, short transitions, and fans, resulting in highly nonuniform flow conditions. In order to predict the performance of a cross flow heat exchanger operating under conditions of nonuniform flow, a suitable mathematical function describing the shape of such velocity profiles and a method for obtaining the mass flow distribution from the velocity profiles are needed. This paper describes the development of an extremely flexible yet simple two-dimensional velocity profile model which is capable of modeling (in addition to uniform flow and turbulent, fully-developed 1/7 power-law flow) randomly distributed or "noisy" flow, and velocity profiles downstream of common airstream appurtenances including but not limited to short transitions, elbows, centrifugal fans, axial fans, and two parallel ducts merging into a short plenum. The method has been incorporated into a preprocessor (to determine the nonuniform mass flow distribution within a cross-flow heat exchanger) for a three-dimensional cross-flow heat exchanger analysis algorithm.
- 一般社団法人日本機械学会の論文
著者
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Taylor Robert
Department Of Mechanical Engineering Mississippi State University
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James Carl
Department of Mechanical Engineering, Mississippi State University
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Hodge B.
Department of Mechanical Engineering, Mississippi State University
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Hodge B.
Department Of Mechanical Engineering Mississippi State University
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James Carl
Department Of Mechanical Engineering Mississippi State University
関連論文
- TED-AJ03-570 A NUMERICAL METHOD FOR ANALYZING A CROSS-FLOW HEAT EXCHANGER ACCOUNTING FOR THE COUPLED EFFECTS OF NONUNIFORM FLOW, LATERAL AND LONGITUDINAL WALL CONDUCTION, AND LAYER STACKING
- TED-AJ03-571 A NOVEL APPROACH FOR MODELING THE NONUNIFORM FLOW DISTRIBUTIONS IN TYPICAL CROSS-FLOW HEAT EXCHANGER INSTALLATIONS
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