利用 CFD 研究核心结构对催化转化器性能的影响

V. Muthukumaran, Selvaraj Balaji, K.M. Senthilkumar, M. Navaneethan, D. D. J. Mano
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摘要

近年来,随着汽车工业的不断发展,未来汽车的一个主要希望就是符合排放法规。汽车会污染空气,而清洁空气法将催化转化器作为一项法律要求,因为催化转化器能将发动机排气中的有害污染物转化为更清洁的排放物。催化转换器的工作原理是催化剂,催化剂可以引起或加速化学反应,但其本身不会发生变化。但催化转换器的存在会增加排气背压,间接影响发动机效率,即发动机效率降低,从而增加耗油量。催化转换器的性能在很大程度上受到基质内部流量分布的影响,均匀的流量分布可以提高催化转换器的效率,降低压降,优化发动机性能。催化转换器组件 15 中的流量分布受进气口和出气口锥形部分的几何配置、基质和废气成分的影响,因此更好地设计催化转换器非常重要。本项目使用 ANSYS WORKBENCH 2022 R1 从根本上了解和研究催化转换器中发生的涉及流体流动、压力和速度剖面的复杂过程。我们分析的主要目的是确定催化转换器的最有效和最佳设计。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Study on Influence of Core Structure on Catalytic Converter Performance Using CFD
In recent years, as the automotive industry is growing, one of the major hope for future vehicles is to meet emissions regulations. Automobiles pollute the air, and clean-air laws have made Catalytic Converters a legal requirement because they convert harmful pollutants from an engine's exhaust into cleaner emissions. The device works with the principle of a catalyst, something that causes or speeds up a chemical reaction without itself being changed. But the presence of a catalytic converter increases the exhaust back pressure which has an indirect effect on the engine efficiency ie engine efficiency decreases, thus increasing fuel consumption. The performance of a catalytic converter is substantially affected by the flow distribution inside the substrate, a uniform flow distribution can increase its efficiency, lower the pressure drop and optimize engine performance. The flow distribution in a catalytic converter assembly 15 is governed by the geometry configurations of the inlet and outlet cone section, the substrate, and exhaust gas compositions, and therefore a better design of the catalytic converter is very important. This Project deals with the fundamental understanding and study of complex processes taking place involving fluid flow, pressure, and velocity profiles in the catalytic converter using ANSYS WORKBENCH 2022 R1. The main objective of our analysis is to determine the most effective and optimum design of a Catalytic Converter
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