An Integrated Engine Cycle Simulation Model with Species Tracking in Piping System
An Integrated Engine Cycle Simulation Model with Species Tracking in Piping System
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DOI：
10.4271/960077
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发表时间：
1996-02
期刊：
影响因子：
--
通讯作者：
Houshun Zhang;S. Widener
中科院分区：
文献类型：
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作者：
Houshun Zhang;S. Widener
由于可压缩性、反应性、蒸发和混合，发动机进气管和排气管中的气体种类浓度变化很大。了解这种行为对于正确预测催化剂性能至关重要，因为催化剂的行为很大程度上取决于瞬时局部物质浓度，而不是气缸中的物质浓度。此外，了解这种行为对于评估废气再循环 (EGR) 的影响更为重要。这项研究的目的是开发一种能够预测整个进气和排气系统瞬时物质浓度的工具，并为不久的将来建立催化剂模型奠定基础。这是通过首先开发一个完整的发动机循环仿真模型来完成的，该模型能够准确预测管道系统中的波浪动力学。然后，通过求解物种守恒方程来完成物种追踪。研究了发动机应用中常见的燃烧形成的十二种物质。与使用当前模型的实验数据进行了比较，并获得了合理的一致性。
Due to compressibility, reactivity, evaporation and mixing, the gas species concentration varies significantly along the intake and exhaust pipes of an engine. An understanding of this behavior is vital to correctly predict catalyst performance because the behavior of a catalyst very much depends on the instantaneous local species concentrations, rather than those in the cylinder. Also, knowing this behavior is more important to assess the effects of exhaust gas recirculation (EGR). The objective of this research is to develop a tool that is capable of predicting the instantaneous species concentration throughout the entire intake and exhaust system, and to lay out a foundation to model catalysts in the near future. This is done by first developing a complete engine cycle simulation model that is able to accurately predict wave dynamics in the piping system. Then, species tracking is accomplished by solving the species conservation equations. The twelve species formed due to combustion commonly seen in engine applications are studied. Comparisons with experimental data using the current model are made, and reasonable agreements are obtained.