Study On The Numerical Simulation Of Heat Transfer Performance For Automotive Intercooler Based On CFD

With the development of the automotive industry, the tube-fins intercooler with its compact, excellent heat transfer performance in the automotive cooling system has been more widely used. According to the different structure parameters, Domestic and foreign scientists have deep and systematic studied the heat transfer tendency in the hot side and cooling side of intercooler and radiatorAs the internal flow field complexity and structural complexity of intercooler, which makes the experimental study get many restrictions. In this paper, the CFD software is used for temperature field and flow field numerical simulation analysis of flat tubes and the louver fins, so it can clearly understand the distribution and changes of internal pressure, temperature and other parameters in cooling flat tubes and the louver fins, Optimizing its geometrical parameters can greatly reduce the experimental design costs and shorten the design cycle.The dimensional finite element models of cooling flat tubes and louver fins are set up, the models on the coupled conduction-convection heat transfer for the cooling flat tubes and the louvered fin geometry are proposed, four different cooling flat tubes and eleven different structure parameters (fin pitch, fin height, fin thickness, louver pitch, louver angle) are studied for researching the heat transfer and flow performance of the intercooler. Also, The CFD numerical results of cooling tubes are compared with the heat transfer Gnielinski experimental correlations, while the friction factor is compared with Webb experimental correlations and Filonenko empirical correlations, Blasius correlations; the numerical results of louver fins are compared with the Dong junqi experimental correlations and Davenport experimental correlations, and found that the numerical calculation values and experimental correlations results consistent. Simultaneously, the factor (j/f)1/3is used to evaluate the optimal structure is multi-channels tube, the second one is triangle channels tube,Also it gives the best comprehensive performance of the louver angle is25°. By numerical calculations, it predicts the heat transfer sensitivity of intercooler owing to the structural parameters of the louver fin changes. Such as fin pitch has the higher sensitivity to heat transfer and pressure drop. It also predicts the fin thickness, louver pitch and louver angle changes which are a weak influence on the heat transfer and pressure loss, the sensitivity is low as a secondary factor for heat transfer and pressure loss.This paper makes the comprehensive numerical simulation of flow and heat transfer on both sides of the intercooler. analyze the impact of the various geometrical parameters on both side of the intercooler, it has a certain academic significance and value, also provides a theoretical basis to optimization design and match selection the car cooling system...