ANALYSIS OF HOMOGENEOUS CHARGE COMPRESSION IGNITION ENGINE WITH EMPHASIS ON COMBUSTION TIMING AND REACTION RATE
ANALYSIS OF HOMOGENEOUS CHARGE COMPRESSION IGNITION ENGINE WITH EMPHASIS ON COMBUSTION TIMING AND REACTION RATE
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均质压压点火发动机的燃烧正时和反应速率分析
DOI：
10.1615/tfec2019.cbf.027525
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
P. Majumdar
中科院分区：
文献类型：
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作者：
A. Bhattacharya;P. Majumdar
均质充量压缩点火发动机的燃烧定时和反应率分析Arunim Bhattacharya，MS北方伊利诺伊大学机械工程系，2017 Pradip Majumdar博士，主任HCCI发动机是一类使用高压缩比点燃空气燃料混合物充量的发动机，基本上不需要火花塞。这与柴油发动机（尽管HCCI可用于柴油发动机）形成对比，在柴油发动机中，燃料在压缩冲程状态的上止点附近喷射。汽油HCCI发动机的重要性在于它试图改善发动机的特性，例如热效率。高压缩比伴随着更高的热效率，但峰值温度仍然足够低，从而具有低的有害氮氧化物和烟灰形成的生产率。然而，存在与这种类型的发动机相关联的某些挑战，其中之一并且可能是所有挑战中最重要的是如何控制燃烧速率。流动动力学和化学动力学分析对于预测燃烧定时、持续时间和速率是必不可少的。本研究的目的是分析均质压燃发动机使用模拟分析模型，包括三维CFD模拟模型。模拟分析使用一个通用的HCCI发动机，首先与简化的化学动力学和使用详细的化学动力学和RANS湍流CFD模型。对转速对燃烧时间、燃烧持续期、放热率、效率和排放浓度的影响进行了敏感性分析。北方伊利诺伊大学
ANALYSIS OF HOMOGENEOUS CHARGE COMPRESSION IGNITION ENGINE WITH EMPHASIS ON COMBUSTION TIMING AND REACTION RATE Arunim Bhattacharya, MS Department of Mechanical Engineering Northern Illinois University, 2017 Dr. Pradip Majumdar, Director HCCI engines are a class of engines which use high compression ratio to ignite a charge of air-fuel mixture, essentially eliminating the need for spark plugs. This contrasts with diesel engines (although HCCI can be used for diesel engines) where the fuel is injected near the top dead center of the compression stroke regime. Gasoline HCCI engine is of significance because it attempts to improve the characteristics of the engine, for example the thermal efficiency. High compression ratio comes with higher thermal efficiency, yet the peak temperature remains low enough to have low production rates of harmful oxides of nitrogen and formation of soot. However, there are certain challenges associated with such type of engine, one of which and perhaps the most important of all is how to control the combustion rate. Flow dynamics and chemical-kinetics analysis, are essential to predict combustion timing, duration, and rate. The objective of this study is to analyze a HCCI engine using simulation analysis models including a three-dimensional CFD simulation model. Simulation analysis is carried out using a generic HCCI engine, initially with simplified chemical kinetics and using detailed chemical kinetics and RANS turbulence CFD model. A sensitivity analysis of the effect of rpm on the combustion time, burn duration, heat release, efficiency and emission concentration is carried out. NORTHERN ILLINOIS UNIVERSITY