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Aluminum plate-fin heat exchangers are compact in its own structure , small size and economic and other prominent advantages , to be more widely used in the field of aerospace, refrigeration and air conditioning , air separation . Fin type , structure, size and internal flow characteristics is an important factor affecting the performance of the heat exchanger , while the serrated fins occupy an important position in the plate-fin heat exchanger applications , for its internal heat transfer and flow characteristics was particularly important. At home and abroad in recent years by computational fluid dynamics (CFD) simulation analysis method to optimize the geometry parameters . CFD method , get intuitive , fast , while significantly reducing the pilot study of workload the fins internal flow field and temperature field , as well as pressure , temperature , speed and thermodynamic parameters of the distribution and changes , and you can clearly understand , thus achieving the optimization and improvement of the design of the heat exchanger . In this regard , the academics also made ??some research . As the heat exchanger inside the structure is very complex, and inside the heat exchanger fins , the separator , and hot and cold fluid is a mutual coupling between the heat transfer problem , separator temperature, and the temperature of the fin surface is not a fixed value , but exists along the hot and cold fluid flow direction and the fin height direction of the temperature gradient, and this impact factors to be considered in none of the previous studies . Further optimize the structure parameters and the design of highly efficient heat exchanger , in previous experimental and theoretical research on the basis of aluminum plate-fin heat exchanger serrated fins for the study, using computational fluid dynamics (CFD) method coupled heat transfer characteristics of plate-fin heat exchanger inside the three-dimensional numerical simulation , and verified by experiment . On this basis , respectively, of the serrated fin fin height , fin thickness and fin spacing of their heat transfer and flow characteristics .
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