设计简介
摘 要
随着汽车技术的发展，涡轮增压系统开始应用的越来越广泛。中冷器作为涡轮增压系统的重要部件也得到了很大的发展。中冷器的作用是降低发动机进气温度，提高充气效率，提高发动机功率。中冷器的形式有很多，管带式是在二十世纪八十年代末九十年代初期开始得到重视和研究的一种新型高效的中冷器。但是，由于管带式中冷器的发展时间还不长，自今尚无成熟的设计和计算理论。因为中冷器也属于换热器的一种，其区别在于中冷器的内部压力大，要求换热过程的压力降小。所以，在实际设计时，我们都是按照换热器理论来进行设计和计算的。本文主要针对长安之星2代0.9L涡轮增压发动机进行管带式空-空中冷器的设计和计算。首先对涡轮增压系统和中冷器进行简单介绍，主要介绍了中冷器出现的背景、作用和分类；然后，根据设计要求，进行设计分析和理论准备；最后，对中冷器进行结构、热力、阻力的计算。根据计算结果，对中冷器进行设计并用catia绘制三维模型和二维工程图纸。
【关键词】：管带式空-空中冷器，设计分析，结构，阻力，计算
Abstract
With the development of automobile industry, turbocharged system began to use more and more widely. charge air cooler system is the important as parts also got very big development. charge air cooler system is to reduce the role of the engine intake temperature, improve charging efficiency, increase engine power. The form has a lot for charge air cooler, introduces the type is in the late 1980s in the early 1990s began to get attention and research of a new efficient charge air cooler. However, due to the development of introduces type charge air cooler is not long time. from today, there is no mature theory on the design and calculating. Because charge air cooler also belongs to a kind of heat exchanger, the difference between the internal pressure is charge air cooler heat exchange process, demanding the pressure drop is small. in actual design, we are in heat exchanger design and calculation theory.
This article mainly aims at Chang'an star second generation 0.9 L turbocharged engine - direct charge air cooler introduces the design and calculation. First to turbocharged system and charge air cooler implement simple introduction, mainly introduced the background, the function and classification of charge air cooler. Then, according to requirements of the design , analysis and theoretical of design should be ready. Finally, the charge air cooler structure, heat, resistance calculation. According to the calculation results, the design and drawing for charge air cooler 3D model by CATIA and two-dimensional engineering drawings.
【Key words】：direct charge air cooler, design analysis, structure, resistance, calculation
