摘要
依据整车环境模拟实验,选取最大扭矩点、中间点和最大功率点(对应的发动机转速分别为1 800,2 800和3 450 r/min)作为发动机舱热管理系统分析的3个工况,应用FLUENT建立发动机舱热管理系统的三维仿真模型,根据实验边界条件,进行风速场和温度场的耦合仿真。采用稳态计算方法,获得发动机舱内外稳定的风速场和温度场分布。对比分析发现仿真结果与实验结果的均方根相对误差在合理范围内,从而验证该发动机舱热管理系统仿真模型的有效性。
According to the vehicle environment simulation experiment the maximum torque point,the interpolation point,and the maximum power point （the corresponding engine speeds are 1 800,2 800and 3 450 r/min） are selected as three working conditions for analyzing the underhood thermalmanagement system. The 3Dsimulation model of underhood thermal management system is established by FLUENT. Based on the expermental boundary conditions,the coupling simulationand temperature field is canied out. The steady state calculation method is used to obtain the wind speed and temperature field distribution inside and outside the underhood. The comparative analysis shows that the root-mean-square relative error between the simulation values and the expermenreasonable range, which can verfy the effectiveness of this simulation model of underhood thermalmanagement system.
出处
《计算机辅助工程》
2017年第6期23-29,共7页
Computer Aided Engineering
关键词
发动机舱
热管理系统
计算流体力学
环境模拟实验
FLUENT
underhood ＆ thermal management system
computational fluid dynamics
environment simulation experiment
FLUENT
