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International Journal of Automotive Technology 2007;8(5): 659-666. |
3-D THERMAL-HYDRAULIC ANALYSIS FOR AIRFLOW OVER A RADIATOR AND ENGINE ROOM |
C.-T. HSIEH, J.-Y. JANG |
National Cheng Kung University |
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ABSTRACT |
In the present study, a numerical analysis of the three-dimensional heat transfer and fluid flow for a vehicle cooling system was developed. The flow field of the engine room between the grille and radiator was analyzed. The results show that, as the airflow inlet grille angle α is varied from 15° to −15°, the air flow rate compared with α=0° (horizontal) changes from −11.9% to +5.1%; while the heat flux from the radiator changes from −9.2% to +4.4%. When the airflow inlet bumper angle β is varied from −5° to +15°, the heat flux from the radiator compared with β=0° (horizontal) increases up to +4.4%. When the airflow inlet grille angle α=−15° and the bumper grill angle β=+15°, the airflow rates and heat flux compared with ( α=0°, β=0°) can be increased to +9.5% and +7.5%, respectively. The results indicate that the optimal angles for cooling efficiency are used. |
Key Words:
Heat transfer, Radiator, Thermal engineering, CFD, Numerical simulations, 3-D |
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