SUV发动机舱热管理一维/三维联合仿真与改进
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摘要
在某款SUV正向研发阶段,为解决中低速爬坡和高速爬坡工况下发动机出水温度偏高的问题,利用一维/三维联合仿真工具,对模型进行发动机舱流场特性及冷却系统性能分析,发现现有防撞梁设计会影响进风量,从而影响发动机出水温度。基于仿真结果提出了改进方案,改进后发动机的出水温度在中低速爬坡和高速爬坡两种工况下分别下降了6.1℃和6.4℃,验证了联合仿真改进方案的可行性。样车阶段,在转毂试验台上采用大流量风机和轴流通风机来模拟汽车行驶过程中的来流空气,并对改进方案进行了整车热平衡试验。通过对比改进后的仿真结果与试验数据,验证了联合仿真模型精度高于95%。
During the forward R&D periods of a sport utility vehicle(SUV),in order to solve the problems of engine outlet water temperature was rather higher in low or medium speed climbing and high speed climbing conditions, 1 D/3 D co-simulation tools were used to analyze the flow field characteristics of engine compartments and the performances of cooling systems. It is found that the design of the existing anti-collision beam affects the air flows and thus affects the engine outlet temperatures. An improved scheme was proposed based on the simulation results, the outlet water temperatures of improved engines are dropped 6.1 ℃ and 6.4 ℃ under the middle or low speed climbing conditions and high speed climbing condition respectively, and the co-simulation improved scheme is verified feasible. In the periods of the sample car,the vehicle thermal balance tests were performed on the chassis dynamometer, and the large mass flow fans and axial flow fans were used to simulate the inflow air during driving. By comparing the improved simulation results with the experimental data, which verify the accuracy of the co-simulation model is higher than 95%.
During the forward R&D periods of a sport utility vehicle(SUV),in order to solve the problems of engine outlet water temperature was rather higher in low or medium speed climbing and high speed climbing conditions, 1 D/3 D co-simulation tools were used to analyze the flow field characteristics of engine compartments and the performances of cooling systems. It is found that the design of the existing anti-collision beam affects the air flows and thus affects the engine outlet temperatures. An improved scheme was proposed based on the simulation results, the outlet water temperatures of improved engines are dropped 6.1 ℃ and 6.4 ℃ under the middle or low speed climbing conditions and high speed climbing condition respectively, and the co-simulation improved scheme is verified feasible. In the periods of the sample car,the vehicle thermal balance tests were performed on the chassis dynamometer, and the large mass flow fans and axial flow fans were used to simulate the inflow air during driving. By comparing the improved simulation results with the experimental data, which verify the accuracy of the co-simulation model is higher than 95%.
引文
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[8] 郭健忠, 罗仁宏, 王之丰,等. 商用车发动机舱热管理一维/三维联合仿真与试验[J]. 中国机械工程, 2016, 27(4): 526-530.GUO Jianzhong, LUO Renhong, WANG Zhifeng, et al. Test and 1D/3D Cosimulation of Thermal Management for a Commercial Vehicle Engine Compartment[J]. China Mechanical Engineering, 2016, 27(4): 526-530.
[9] LU Pengyu, GAO Qing, WANG Yan. The Simulation Methods Based on 1D/3D Collaborative Computing for the Vehicle Integrated Thermal Management[J]. Applied Thermal Engineering, 2016,104: 42-53.
[10] 谷正气. 汽车空气动力学[M]. 北京: 人民交通出版社, 2005.GU Zhengqi. Automobile Aerodynamics[M]. Beijing: China Communications Press, 2005.
[11] H?RMANN T, LENCHER B, PUNTIGAM W. Numerical and Experimental Investigation of Flow and Temperature Fields around Automotive Cooling System[J]. SAE Paper, 2005-01-2006.
[2] 齐斌. 载重车热管理系统仿真[J]. 柴油机设计与制造, 2008, 15(3): 32-35.QI Bin. Thermal Management Simulation on Heavy-duty Truck[J]. Design and Manufacture of Diesel Engine, 2008, 15(3): 32-35.
[3] 成晓北, 潘立,周祥军. 车用发动机冷却系统工作过程与匹配计算[J]. 汽车工程, 2008,30(9):758-763CHENG Xiaobei, PAN Li, ZHOU Xiangjun. Working Process and Maching Simulation of Cooling System in Vehicle Dieses[J]. Automotive Engineering, 2008, 30(9): 758-763.
[4] 陈义. 基于STAR-CCM+的发动机舱热管理分析[J]. 机电技术, 2014(1): 93-94.CHEN Yi. Vehicle Compartment Thermal Management Based on STAR-CCM+[J]. Mechanical& Electrical Technology, 2014(1):93-94.
[5] 周建军, 杨坤. 数值模拟在整车热管理中的应用[J]. 上海汽车, 2009(7): 16-17ZHOU Jianjun, YANG Kun. Application of Numerical Simulation in Vehicle Thermal Management[J]. Shanghai Auto, 2009(7):16-17.
[6] 袁聿震. 基于一、三维耦合的车辆热管理系统仿真计算[D]. 济南: 山东大学, 2012. ()() YUAN Yuzhen. A 1D-3D Coupling Numerical Simulation for Vehicle Thermal Managementsystem[D]. Jinan: Shandong University, 2012.
[7] 梁小波, 袁侠义, 谷正气,等. 运用一维/三维联合仿真的汽车热管理分析[J]. 汽车工程, 2010, 32(9):793-798.LIANG Xiaobo, YUAN Xiayi, GU Zhengqi, at al. Automotive Thermal Management Analysis by Applying Joint 1D/3D Simulation[J]. Automotive Engineering, 2010, 32(9):793-798.
[8] 郭健忠, 罗仁宏, 王之丰,等. 商用车发动机舱热管理一维/三维联合仿真与试验[J]. 中国机械工程, 2016, 27(4): 526-530.GUO Jianzhong, LUO Renhong, WANG Zhifeng, et al. Test and 1D/3D Cosimulation of Thermal Management for a Commercial Vehicle Engine Compartment[J]. China Mechanical Engineering, 2016, 27(4): 526-530.
[9] LU Pengyu, GAO Qing, WANG Yan. The Simulation Methods Based on 1D/3D Collaborative Computing for the Vehicle Integrated Thermal Management[J]. Applied Thermal Engineering, 2016,104: 42-53.
[10] 谷正气. 汽车空气动力学[M]. 北京: 人民交通出版社, 2005.GU Zhengqi. Automobile Aerodynamics[M]. Beijing: China Communications Press, 2005.
[11] H?RMANN T, LENCHER B, PUNTIGAM W. Numerical and Experimental Investigation of Flow and Temperature Fields around Automotive Cooling System[J]. SAE Paper, 2005-01-2006.