Simulation Analysis of Flow Field in Engine Compartment of a Rear-Mounted Exhaust

7th Annual International Conference on Materials Science and Engineering

Xie, Y.Y.^1 ; Zhang, L.Q.^1 ; Yan, Y.L.^1 ; Qiu, S.W.^2 ; Tan, C.Z.^3

Mechanical and Electrical Engineering Institute, Central South University of Forestry and Technology, Changsha, Hunan

410000, China^1

State Key Laboratory of Advanced Design and Manufacture for Vehicle Body, Hunan University, Changsha, Hunan

410082, China^2

Changan Oushang Automotive Research Institute, Chongqing

400023, China^3

关键词: Computational fluid;    Engine compartments;    Experimental values;    Simulation analysis;    Simulation model;    Three dimensional flow field;    Wind tunnel modeling;    Windward surface;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/562/1/012056/pdf
DOI  :  10.1088/1757-899X/562/1/012056

来源: IOP

【 摘 要 】

The numerical simulation of the flow field in the engine compartment of a car is the basis for the evaluation and research of the air flow characteristics in the engine compartment. In this paper, the computational fluid simulation software STAR-CCM+ was applied to simplify the vehicle model of a rear-mounted exhaust. The surface wrapper and surface remesher were used to obtain the whole vehicle surface mesh. Combining with the vehicle wind tunnel model was generated the volume mesh based on Trim mesh sub-regional method. Then, the finite element model of the car engine compartment was established. Three-dimensional flow field in engine compartment was analyzed under reasonable boundary conditions, and found the reflow at climbing is more apparent as compared with that at high constant speed. Then the flow rate experiment of the whole vehicle was obtained wind speed value of the windward surface of the radiator. The error between the simulated value and the experimental value is within 10%, indicating that the simulation model established in this paper is reliable and possesses high simulating accuracy.