| 曾文,解茂昭,贾明.发动机催化燃烧多维数值模拟[J].,2008,(1):43-50 |
| 发动机催化燃烧多维数值模拟 |
| Multidimensional numerical simulation of catalytic combustion in a HCCI engine |
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| DOI：10.7511/dllgxb200801009 |
| 中文关键词: 催化燃烧 均质压燃 化学动力学模型 数值模拟 甲烷 CFD模型 |
| 英文关键词: catalytic combustion homogeneous charge compression ignition (HCCI) chemical kinetics model numerical simulation methane CFD model |
| 基金项目:国家“八六三”基础研究重点规划资助项目(2001CB209201). |
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| 中文摘要: |
| 将发动机三维CFD程序KIVA-3V与化学动力学程序CHEMKIN III及DETCHEM相耦合，模拟了催化燃烧对均质压燃(HCCI)发动机燃烧过程及排放的影响. 发动机以甲烷为燃料，其表面和空间氧化反应采用了详细的动力学机理. 利用此模型分析了活塞顶催化剂铂(Pt)或铑(Rh)涂层对HCCI发动机着火时刻、缸内温度场及HC、CO、NO x 排放的影响，结果表明催化燃烧会使HCCI发动机着火时刻提前，同时能降低HC、CO的排放，但会提高NO x 的排放；在相同工况下，相比催化剂Pt，催化剂Rh使HCCI发动机着火时刻提前的幅度要大，同时HC的排放要低，但CO及NO x 的排放要高. |
| 英文摘要: |
| By coupling the KIVA-3V engine computational fluid dynamic(CFD) package with the CHEMKIN III and DETCHEM chemical kinetics packages, the effects of catalytic combustion on the combustion process and emissions of homogeneous charge compression ignition(HCCI) engine were simulated. Methane was used as fuel and the detailed surface and gas reaction mechanisms were adopted. The effects of catalytic combustion on the ignition timing, temperature field and HC, CO and NO x emissions of a HCCI engine whose piston surface was coated with catalyst (rhodium or platinum) were discussed. The results show that the ignition timing is advanced and the emissions of HC and CO are decreased, but the NO x emission is increased slightly by using catalyst coating on the piston surface. In the same conditions, compared with catalyst Pt, the ignition timing is more advanced, and the emissions of HC are lower, but the emissions of CO and NO x are higher with catalyst Rh on the piston surface. |
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