TY - JOUR
TI - Numerical investigation of effect of the flow field structure and cooling medium of tubes on the heat transfer performance of automotive radiator
AU - Ma Zongpeng
AU - Huang Ying
AU - Chen Xiaoling
AU - Song Jiangnan
AU - Zhang Xiang
AU - Li Taike
AU - Chen Lunjun
JN - Thermal Science
PY - 2023
VL - 27
IS - 6
SP - 4733
EP - 4746
PT - Article
AB - The flow field structure and cooling medium of tubes have major influence on the heat transfer performance of automotive radiator. In this study, two novel types of radiator tube (wasp-waisted tube 2# and wasp-waisted tube 3#) are developed, six types radiator tubes with different flow field structures and equal flow cross-sectional area are numerically simulated. In addition, four nanofluids with different concentrations (Al2O3-water, SiO2-water, TiO2-water, and CuO-water) were studied in Reynolds number 2500-7500. The results show that the heat transfer capacity of the wasp-waisted tube 2# and the wasp-waisted tube 3# is significantly better than that of the other radiator tubes, followed by the wasp-waisted tube. Compared with the wasp-waisted tube, the heat transfer coefficient of the wasp-waisted tube 2# and the wasp-waisted tube 3# increased by 10.6% and 3.5%, respectively. On the other hand, nanoparticles improve the heat transfer efficiency of base fluid. When Reynolds number reaches 7500 and the volume concentration is 3%, the Nunf/Nubf of SiO2-water is 5.52%, 5.22%, and 8.70% higher than that of Al2O3-water, TiO2-water, and CuO-water, respectively. The comprehensive heat transfer capacity of SiO2-water-3% in the wasp-waisted tube is the best.