Research On Cooling Performance Ehancement For Engineering Vehicle Based On Aero Wing

The radiator is an important part of construction vehicle cooling system,the protection of the system can have good thermal balance under different working conditions and environmental temperature,With domestic and international increasingly stringent emission regulations,the emergence of many new emissions reduction technology also put forward higher requirements for the cooling system at the same time.In addition to the power cabin space limitations,only relying on the traditional way can not increase the size of the radiator to effectively solve the problem of heat dissipation system,development of efficient and compact heat sink is heavy and difficult industry at present.Based on an engineering vehicle radiator as the research object,using CFD analyzes the performance of the air side and test,according to the simulation results of airfoil tube fin radiator unit,the air side heat transfer performance and resistance performance analysis,adjust the structure of radiator parameters,estimate the performance of several aspects of improvement after.The air side heat transfer and air flow of the flat fin tube radiator of an engineering vehicle are analyzed,and the relevant wind tunnel test is carried out.The results show that in the velocity range,the air side pressure loss and heat transfer coefficient are in good agreement with the experimental values,and the average deviation between the two is less than 5%.Put forward the improvement on the existing airfoil heat pipe flat tube,using the same method simulates the airfoil tube fin unit,the characteristics of distribution of the internal temperature field and stress analysis,we conclude that the improved radiator air side heat transfer and flow resistance performance,and the comprehensive performance evaluation factor than both j/f^1/3.The results show that the comprehensive evaluation factor of airfoil fin is slightly higher than that of flat fin,and it is about 23%higher than that of inlet fin 10m/s.The influence of the structural parameters on the performance of the fin tube fin heat sink is analyzed by using the fin tube element,and the sensitivity of each structural parameter is analyzed by orthogonal test and signal to noise ratio.The results show that the SNR analysis of heat exchanger tube diameter of finned tube radiator performance impact is 28.88%;tube spacing,tube type and tube spacing on the influence of the times,are 23.91%,20.50%and 11.18%;fin spacing and fin thickness effect on the minimum which on respectively 9.63%and 5.90%.The mathematical model of airfoil tube fin radiator performance prediction,and to establish the air side pressure loss and the amount of heat as the design object,using multi-objective genetic algorithm to solve the model,which is validated by simulation model,the simulation results are consistent in the two interval matrix.