【毕业设计】基于Flowmaster的4H发动机热管理系统的计算.doc

摘要 发动机热管理技术,可以保证发动机部件和系统安全高效运行,控制和优化热量传递过程,减小冷却系统的尺寸和功率消耗,合理利用热能,降低废热排放,提高能源利用效率减少环境污染。根据4H发动机热管理系统的特点，利用Flowmaster软件建立发动机冷却系统、润滑系统和热管理系统的仿真模型，并对其进行仿真计算。根据实践经验，发动机热管理系统的仿真计算选择额定工况进行。 通过对额定工况的仿真计算，分析热管理系统中冷却系统和润滑系统的工作状态，并为热管理系统中零部件的选型和优化提供指导意见。本文重点分析车速、散热器散热面积和机舱背压对冷却系统性能的影响，机油泵转速对润滑系统的影响。根据理论设计参数，对冷却系统、润滑系统和热管理系统仿真结果及设计理论值进行对比分析。 关键字：发动机热管理；冷却系统；润滑系统；Flowmaster仿真  Abstract Engine thermal management techniques, can ensure the efficient operation of engine components and systems security, control and optimize the heat transfer process, reducing the size and power consumption of the cooling system, and the rational use of heat, reducing the waste heat emissions, improve energy efficiency and reduce environmental pollution. According to the characteristics of the 4H engine thermal management system, Use Flowmaster software to build simulation model of the engine cooling system, lubrication system and thermal management systems, and simulation. According to practical experience, the simulation of engine thermal management system to select the rated operating conditions. Through the simulation of the rated operating conditions, analyze the state of the thermal management system, cooling system and lubrication system, and provide guidance for the selection and optimization of thermal management system components. This paper focuses on speed, radiator area and the cabin back pressure on the cooling system performance, and speed of the oil pump lubrication system. According to the theory of design parameters on the cooling system, lubrication system and thermal management system simulation results and design of the theoretical value were analyzed. Keyword: Engine Thermal Management; Lubrication System; Cooling System;Flowmaster Simulation  目录 摘要 I Abstract II 1 绪论 1 1.1 课题来源 1 1.2 EQ4H系列发动机简介 1 1.2.1 冷却系统简介 2 1.2.2 润滑系统简介 3 1.3 发动机热管理系统概述 4 1.3.1 冷却系统热管理 5 1.3.2 润滑系统热管理 5 1.4 国内外研究现状及发展趋势 6 1.5 本文的主要工作内容 7 2 理论基础 8 2.1 发动机热平衡分析 8 2.2 冷却系统理论分析 10 2.2.1 冷却系统传热分析及评价 10 2.2.