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ISSN Печать: 1065-5131
ISSN Онлайн: 1563-5074
Indexed in
EFFECT OF INLET CONFIGURATION ON DISTRIBUTION OF AIR-WATER ANNULAR FLOW IN A HEADER OF A PARALLEL FLOW HEAT EXCHANGER
Краткое описание
The effect of inlet configuration (parallel, normal, vertical) on flow distribution in a parallel flow heat exchanger consisting of round headers and ten flat tubes is experimentally investigated using air and water. The effects of tube protrusion depth as well as mass flux and quality are investigated both for the downward and upward flow configurations. It is shown that the best flow distribution is obtained for the vertical inlet configuration, followed by normal and parallel inlet configurations. For downward flow, a significant amount of water flowed into the frontal channels. As the protrusion depth increases, more water is forced to the rear part of the header. The effect is most significant for the parallel inlet, followed by the normal and vertical inlet. The effect of mass flux or quality is qualitatively the same as that of the protrusion depth. For upward flow, a significant amount of water flows through the rear part of the header. The effect of the protrusion depth is the same as that of the downward flow. However, the effect of mass flux or quality is opposite the downward flow. A possible explanation is provided based on flow visualization results. Correlations were developed to predict the fraction of liquid or gas taken off by a downstream channel as a function of header gas or liquid Reynolds number immediately upstream.
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Saha Sujoy Kumar, Ranjan Hrishiraj, Emani Madhu Sruthi, Bharti Anand Kumar, Wavy Fin, 3D Corrugated Fin, Perforated Fin, Pin Fin, Wire Mesh, Metal Foam Fin, Packings, Numerical Simulation, in Heat Transfer Enhancement in Plate and Fin Extended Surfaces, 2020. Crossref