Abstract：To explore the airflow energy recovery technology for increasing the driving range of electric vehicle, an airflow energy recovery device was designed. Based on the research method of small wind power generator, the device was constructed with lift-drag hybrid vertical axis wind turbine (VAWT) and air duct. After added air duct, the flow around the vehicle head was changed, and the effects of flow change were analyzed. Based on energy conversion theory with considering dimension constraints of electric vehicle cabin space, the structure of air duct was designed. The effects of air duct on wind speed enhancement were verified through CFX simulation. The models of original car, original car with air duct and original car with wind turbine and air duct were established in CATIA. The effects of airflow energy recovery device on the vehicle aerodynamic drag were investigated in Ansys CFX. Based on the similarity principle, the bench tests were conducted on a scale-up model to obtain the flow fields inside the air duct. The results show that the wind speed can be increased by 30% after concentrated by the air duct. When wind energy recovery device is added, the aerodynamic drag of the electric vehicle is reduced by about 8.84%. When air duct and wind turbine are in the best matching position, the cut-in speed of wind turbine is about 4.78 km·h-1 with the maximum rotational speed of 458 r·min-1.
江浩斌, 李傲雪, 马世典, 陈龙. 电动汽车气流能量回收装置的设计与性能分析[J]. 江苏大学学报（自然科学版）, 2017, 38(2): 125-132.
JIANG Hao-Bin, LI Ao-Xue, MA Shi-Dian, CHEN Long. Design and performance analysis of airflow energy recovery device of electric vehicle[J]. Journal of Jiangsu University(Natural Science Eidtion)
, 2017, 38(2): 125-132.
2017, Vol. 38 
