Research On Modularized Performance Of Flat Tube-and-fin Radiator Based On CFD Simulation

It is especially important to select a suitable equation for the quantitative calculation of the heat dissipation performance of the engineering vehicle segment radiator.The study of the whole air flow channel unit model of the radiator is widely used in engineering to predict and improve its heat dissipation performance.However,the application of a smaller unit model to predict the performance parameters of the radiator is very lacking.The correlation between the heat dissipation performance correlations of the unit modules of different heat pipe rows was found by quantitative analysis.CFD numerical analysis is carried out on the air-side heat transfer and pressure drop of a unit vehicle radiator for a certain project,and the relevant data results are verified.The results show that the average deviation of the air side pressure loss and the heat transfer coefficient simulation value and the numerical value in the literature are both within 5%.According to the split structure of unit modules with different heat pipe rows,the variation trend of heat transfer coefficient,pressure loss and Colburn factor of 1～5 rows pipe is analyzed.At the same time,the flow field distribution of temperature and pressure cloud images is compared,and the performance variation between modules is studied.Furthermore,a power exponential fitting equation based on the least squares method is used to fit the 1～5 rows pipe module,and the F-significance test is performed.The results show that there is a certain correlation between the heat dissipation performance of different modules,and the periodic flow field distribution of temperature and pressure has the same trend at the same position.Then the fitted equations of the fitted 1～5 rows of modules are significant,and effectively predicting 100%,100%,96.30%,96.30%,and 88.9% Colburn factor simulation data,and effectively predicting 100%,98.15%,98.15%,96.30%,and 98% friction factor simulation data within a 10% error range.The absolute error of the data is within 5%.The correlation of the power exponent of the independent variable parameter of the heat transfer performance equation of 1～5 rows pipe is analyzed,and the prediction formula of the radiator performance is deduced,and the 6 rows pipe is predicted.The results show that the radiator performance prediction equation can effectively predict the original simulation data and fitting equation data of 1～5 rows pipe within the allowable range of error.And the 6 rows pipe prediction equation effectively predicts Colburn factor of 87.04% within the 15% error range and effectively predicts friction factor of 92.59% within the 10% error range,and the absolute error is within 10%.Fig 40;Table 6;References 52...