UC知道找人帮忙翻译!关于涡轮增压器的!翻译完成后再追加分!
来源：百度知道 编辑：UC知道 时间：2024/06/15 07:36:32
5 Exhaust gas turbocharging
5.1 Objectives and applications for exhaust gas turbocharging
The clear objective of exhaust gas turbocharging is the increase in power density of reciprocating
piston internal combustion engines by means of precompressing the work medium, i.e., air. It utilizes the exhaust gas energy which otherwise – due to the geometrically given expansion ratio of the crank mechanism – would be lost at the end of the high-pressure cycle. Simultaneously, the
boundary conditions for combustion and the high-pressure cycle can be improved so that their
control and emission level can be optimized. Therefore, the main application areas for exhaust gas turbocharging are those in which high engine power density has to be obtained in combination with minimized emission and fuel consumption values. Thus, exhaust gas turbocharging will always be preferred, if it can be realized technically and at an acceptable cost.
5.2 Basic fluid mechanics of turboch
5.1 Objectives and applications for exhaust gas turbocharging
The clear objective of exhaust gas turbocharging is the increase in power density of reciprocating
piston internal combustion engines by means of precompressing the work medium, i.e., air. It utilizes the exhaust gas energy which otherwise – due to the geometrically given expansion ratio of the crank mechanism – would be lost at the end of the high-pressure cycle. Simultaneously, the
boundary conditions for combustion and the high-pressure cycle can be improved so that their
control and emission level can be optimized. Therefore, the main application areas for exhaust gas turbocharging are those in which high engine power density has to be obtained in combination with minimized emission and fuel consumption values. Thus, exhaust gas turbocharging will always be preferred, if it can be realized technically and at an acceptable cost.
5.2 Basic fluid mechanics of turboch
5废气涡轮增压
5.1目标和应用的废气涡轮增压
的明确目标废气涡轮增压是提高功率密度的往复
活塞式内燃机的方式precompressing的工作中，即空气。它利用废气能源否则-由于几何给予膨胀率的曲柄机构-将会消失在年底高压循环。同时，
燃烧边界条件和高压力周期可以改进，以便其
控制和排放水平可被优化。因此，主要应用领域的废气涡轮增压是那些发动机功率密度高，必须获得结合最小排放和燃料消耗值。因此，废气涡轮增压将永远是首选，如果它能够实现技术上和以可接受的成本。
5.2基本流体力学涡轮增压器组件
本节将主要讨论基本流体力学必要了解增压设备，流动压缩机和涡轮机。它不会讨论这些问题和方法与他们的布局和优化。为此，我们参考有关文献[ 42,43 ， 81 ， 90 ] 。
5.2.1能量传递涡轮机
压缩
在flowcompressors ，压力增加thework中等发生在几个阶段的程序几乎同时。一方面，通过增加外部机械能，媒介是被迫矢量速度，即动能（更改国家1至2 ）压缩机叶轮。这是压力，然后转变为能源（更改国家的2至3 ） ，部分由减速的媒介的不同刀片渠道压缩机叶轮本身，部分下游静态扩散。增加能源和压力增加（在减速流）可以说是利用热力学第一定律的开放系统（也见均衡器。 （ 2.15 ） ，而不考虑的影响，大地测量高度） ：
（ 5.1 ）
在介绍了焓h ，重技术工作增加（或减少）由境外，并qadd的热量增加（或减少）由境外。
根据假设的绝热系统（ 1-2 ） ，以下适用于除动能重：
5.2
5.3
的压力上升流减速（ 2-3 ）以下适用于：
5.4
并与H = ü和规划/ ρ