Improved design of engine compartment for a commercial vehicle based on CFD
1. School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China; 2. Nanjing IVECO Automobile Co., Ltd., Nanjing, Jiangsu 210028, China
Abstract：To solve the problems of a commercial vehicle with high temperature in condenser and poor thermal environment in engine compartment under idle condition in summer, the porous media model and the multiple reference frame were respectively used to simplify heat exchangers and fan, and the computational fluid dynamics (CFD) model for thermal analysis of engine compartment was established in the finite element software. The CFD software was used to simulate the distribution of flow field and temperature field in engine compartment. The effects of thermal convection and thermal radiation on thermal environment of engine compartment were also considered. According to the flow field and temperature field distribution, the location of heat reflux in engine compartment and the cause of high temperature in heat damage area were determined. Considering the layout and the development cost of entire engine compartment, an improved scheme of adding a spoiler on the condenser side and a deflector at the bottom of condenser was proposed, and the improved scheme was verified by simulation. The simulation results show that the heat reflux is effectively reduced, and the engine compartment thermal environment is significantly improved by adding spoiler and deflector.
王露阳1, 王良模1, 邹小俊2, 谢桃新2, 张汤赟2. 基于CFD的某商用车发动机舱的改进设计[J]. 江苏大学学报（自然科学版）, 2018, 39(5): 517-522.
WANG Lu-Yang-1, WANG Liang-Mo-1, ZOU Xiao-Jun-2, XIE Tao-Xin-2, ZHANG Tang-Bin-2. Improved design of engine compartment for a commercial vehicle based on CFD[J]. Journal of Jiangsu University(Natural Science Eidtion)
, 2018, 39(5): 517-522.
2018, Vol. 39 
