Numerical Simulation And Experimental Study For Plate-fin Heat Exchanger Thermodynamics Characteristic

Aluminum plate-fin heat exchangers are more and more widely used in aviation and aerospace, refrigeration air conditioning, air separation and other areas, due to its own compact structure, small size and economy and good outstanding advantages. Fin type, structure, size and internal flow characteristics that affect heat exchanger performance of an important factor, while the slit fin in the plate-fin heat exchanger applications occupy an important position, so for its internal heat transfer and flow characteristics of explicit important.In recent years, the international community that through the computational fluid dynamics (CFD) simulation analysis to optimize the structural parameters of the geometric. In access to the intuitive, fast, while significantly reducing the workload of the experimental study, and clear understanding of fin internal flow field and temperature field was showed, as well as pressure, temperature, speed and other thermodynamic parameters of the distribution and changes, so as to realize heat exchanger design optimization and improvement. The scholars in this area also made some study. As the heat exchanger's internal structure is very complex, also fin and partitions and fluid are coupled each other, partitions and fin surface temperature are not fixed value, but temperature gradient exists along the fluid flow direction and the fin height direction, this influencing factor is overlooked in previous studies.Based on previous experimental and theoretical studies, in order to further optimize the structural parameters of high-performance heat exchangers and design, taken aluminum plate-fin heat interchanger in commonly used slit fin as object in this paper. Computational fluid dynamics(CFD) simulation was applied to analyze thermodynamics characteristics. Meanwhile through the heat exchanger performance experiment verified the correctness of the model. On this basis, analyzed the different fin height, fin thickness and fin space to its heat transfer and fluid flow influence.