【作者】 杨胜；

【导师】 张扬军；

【作者基本信息】 清华大学 ， 机械工程， 2004， 硕士

【摘要】 热管理为汽车节能、安全和环保的重要技术之一,是当代汽车研究与开发、特别是燃料电池等电动汽车研究与开发所面临的主要难点之一。建立汽车热管理系统试验公共技术平台,对于突破热管理系统集成关键技术,加强热管理系统的设计集成和制造集成,向模块化设计、系统化配套的方向发展具有重要意义。论文针对汽车热管理系统试验平台柔性化的难点,采用物理模拟和仿真模拟相结合的方法,进行了汽车热管理系统半物理仿真试验平台的设计、试制及分析研究。通过对不同热管理系统的模块化分析,设计了半物理仿真试验平台的物理模拟系统,并试制了热源模块和测试模块等关键模块。通过分析热管理系统热源、换热器、水泵等关键部件流动和传热机理,建立了热管理系统的物理数学模型。利用有限差分法进行求解,发展了试验平台仿真模拟系统。应用仿真模拟系统研究了燃料电池堆热管理系统,并与试验进行对比,验证了仿真模拟系统的可用性。应用仿真模拟系统研究了试验平台物理模拟系统。分析了系统热容和管道长度对系统静动态性能的影响,为物理模拟不同热管理系统静动态特性提供了依据;分析了物理模拟系统的运行调节过程,为其运行和控制提供了指导。更多还原

【Abstract】 Thermal management is critical for automobile fuel economization and safety, as well as environment protection. It is a main technical barrier of automobile R&D, especially for FCV (Fuel cell vehicle) and other electric vehicles. Experiment platform of thermal management systems can help us break through the key technology of thermal management system design integration and manufacturing integration. Thermal management objects and structures vary with different vehicle. Flexibility of the experiment platform, capability of simulating characteristics of different thermal management objects and systems, is a key problem.A semi-physical simulation experiment platform, which includes a physical subsystem and a numeric subsystem, was designed. With the combination of the two subsystems, the platform can simulate different thermal management objects and structures.Mathematical model and arithmetic of the numeric system was developed based on the principle of thermal fluid dynamics.With the numeric system, A Fuel Cell stack thermal management system was investigated and the result agreed well with the measured data.With the numeric simulation system the physical simulation system was analyzed. The effects of the ducts length and system thermal capacity on the system steady and transient characteristics were investigated in detail. The control strategy was investigated as well to guide the operation of physical system.更多还原