Vehicle Radiators’ Performance Calculation and Improvement Based onthe Coupling of Multi-scale Models Simulations

摘要

In simulation of the heat transfer between radiator and air flow field, the adoption of the radiator full-sizemodel containing its core body structure with small feature sizes would require huge storage space and not be economical.In view of this question, based on the coupling of multi-scale models simulations, a calculation method of radiatorperformance is proposed in this paper the reliability of which is verified by an experiment test. Subsequently, theinfluence on the radiators’ thermal performance of the layout of the parts in front of the radiators is analyzed. Lastly, thelayout of the front parts is modified to enhance the radiators’ thermal performance. The investigation results indicate that:the radiators’ thermal performance calculation method based on simulations coupling of radiator multi-scale modelsconsiders the influences of air-side flow field distribution and the core body structure details; the error of the calculatingvalues from the method is less than 5%, and the method is reliable; when the heat source parts in front of the radiators aresituated right in front of the rear fan channel, the radiators thermal performance is better; the radiators cooling powerincreases 19.3kW after layout modification of the front heat resource parts.