Research On Structural Optimization Of Automotive Tube Belt Radiator

The stable operation of the on-board engine requires an appropriate operating temperature,and the engine cooling system is the key to ensure that the engine operates at the appropriate temperature.The engine radiator is an important part of the engine cooling system,so the performance of the radiator directly affects the safety and stability of the vehicle.The modern automobile industry is undergoing rapid development,but the engine cooling system is often overlooked in automobile design,and even a lower hood is designed to design the beautiful car model and compress the cooling system space.Therefore,while ensuring that the radiator stably provides sufficient heat dissipation,it is of great practical significance to realize the miniaturization and weight reduction of radiator components.A radiator with a smaller size and higher heat dissipation efficiency is an inevitable trend to comply with the development of automobiles.With the development of computer technology,the emergence of the simulation method CFD can more accurately study the complicated flow conditions of louver fins.By analyzing the flow and heat transfer of the model,it is important to optimize and design the radiator with louver fins.Guiding role.Therefore,in order to achieve lighter engine radiators,this paper uses the CFD simulation method to study the impact of several important radiator geometry parameters on heat dissipation performance,and selects fin pitch,fin wave height,flat tube section width,and flat tube section.The structural parameters of the size of the four radiators in length and the opening angle of the louver that have the greatest influence on the air side flow resistance are studied to optimize the structural size of the radiator.This article uses the method of combining experiment and theoretical analysis to do the following work:(1)On the basis of the enthalpy difference laboratory,water is used as a cooling medium to test the flow resistance and heat dissipation performance of a commercial model car radiator.By changing the medium-side flow conditions and the air-side inlet speed conditions,25 sets of performance tests under different conditions were conducted to provide a test basis for the establishment of the CFD simulation model.(2)Using the CFD simulation method,three-dimensional modeling of the local fin model of the vehicle engine tube and band radiator is carried out,and these structures are analyzed by changing the angle of the louver,the wave height and wave distance of the fin of the louver,the width and length of the flat tube The influence of parameters on the performance of the radiator.(3)Fit the equation coefficients of the flow field and temperature field of the simulation data to establish a mathematical model.Without changing the external dimensions of the radiator and satisfying the flow resistance,the fin structure of the radiator is optimized by particle swarm optimization,and a structural scheme for optimizing the radiator is proposed.After the optimization of the fin structure,thepressure drop on the air side remained basically unchanged,and the heat dissipation increased by 11.6%.