摘要
建立某型电源车车舱三维CFD模型,选取Realizable k-ε湍流模型,对电源车车舱内空气流场和温度场进行仿真计算,分析车舱的通风散热情况,发现了柴油发电机组和消声器散热存在的问题,并通过在机组舱后壁设计一个轴流风机对散热结构进行了改进。针对改进后的模型进行通风散热仿真分析,发现柴油发电机组和消声器表面温度明显下降。对车舱内温度进行实测,将测试结果与仿真计算结果进行对比分析,结果表明,增加轴流风机后车舱内通风散热效果明显改善。
A three-dimensional computational fluid dynamics （CFD） model was applied to study the ventilation and heat dissipation for a power vehicle. The airflow and temperature fields were calculated and analyzed by using realizable turbulence model and the heat dissipation problems were identified. An axial fan was designed on the generator-set chamber wall to improve the ventilation for cooling, and then the temperatures on generator-set and mufflers dropped apparently. Moreover, experiments were conducted to measure the temperatures on the power vehicle and the results were compared between the simulation and measurements. The results show that ventilation cooling effect of the power supply vehicle has been greatly improved when the axial fan was added.
出处
《汽车工程学报》
2015年第5期359-366,共8页
Chinese Journal of Automotive Engineering
基金
军内科研重点项目(TZ-CQTY-Y-A-2012-001
TZ-CQTY-Y-A-2013-001)
关键词
电源车
通风散热
流场
温度场
power vehicle
ventilation and heat dissipation
airflow field
temperature field
