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首页> 外文期刊>Energy Conversion & Management >Development of a new reduced hydrogen combustion mechanism with NOx and parametric study of hydrogen HCCI combustion using stochastic reactor model
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Development of a new reduced hydrogen combustion mechanism with NOx and parametric study of hydrogen HCCI combustion using stochastic reactor model

机译：使用NOx的新型还原氢气燃烧机理的开发以及使用随机反应器模型的HCCI氢气燃烧参数研究

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Hydrogen is a potential alternative and renewable fuel for homogenous charge compression ignition (HCCI) engine to achieve higher efficiency and zero emissions of CO, unburned hydrocarbons as well as other greenhouse gases such as CO2 and CH4. In this study, a detailed hydrogen oxidation mechanism with NO. was developed by incorporating additional species and NO. reactions to the existing hydrogen combustion mechanism (10 species and 40 reactions). The detailed hydrogen combustion mechanism used in this study consists of 39 species and 311 reactions. A reduced mechanism consisting 30 species and 253 reactions was also developed by using directed relation graph (DRG) method from detailed mechanism. Developed mechanisms were validated with experimental data by HCCI engine simulation using stochastic reactor model. Sensitivity analysis was performed to identify the most important reactions in hydrogen combustion and NO. formation in HCCI engine. Pathway analysis was also performed to analyze the important reaction pathways at different temperatures. Results revealed that H-2 + HO2 [=] H + H2O2 and O2 + NNH [=] N2 + HO2 are the most significant reactions in the hydrogen HCCI combustion and NO. formation respectively. Detailed parametric study of HCCI combustion was conducted using developed chemical kinetic model. Numerical simulations are performed at different engine operating condition by varying engine speed (1000-3000 rpm), intake air temperature (380-460 K), and compression ratio (16-18) at different relative air fuel ratios (lambda). The HCCI operating range was determined for different compression ratios and results show that operating range expands with increase in comptession ratio. The effect of intake temperature, engine speed and equivalence ratio on cylinder pressure and heat release rate were investigated. Maximum thermal efficiency of 46% and maximum combustion efficiency of 98% was observed among all the test conditions. Parametric study of NOx emissions was also conducted and it was found that NO emissions decrease exponentially from higher to lower engine loads. (C) 2016 Elsevier Ltd. All rights reserved.
机译：氢是均质充量压燃（HCCI）发动机的潜在替代能源和可再生燃料，可实现更高的效率并实现CO，未燃烧的碳氢化合物以及其他温室气体（如CO2和CH4）的零排放。在这项研究中，详细的氢氧化机理与NO。通过结合其他物种和NO来开发。对现有氢燃烧机理的反应（10种和40个反应）。本研究中使用的详细氢气燃烧机理由39种和311个反应组成。从详细机理出发，采用有向关系图（DRG）方法，建立了由30个物种和253个反应组成的还原机理。通过使用随机反应堆模型的HCCI发动机仿真，通过实验数据验证了已开发的机理。进行了敏感性分析，以确定氢燃烧和NO中最重要的反应。 HCCI发动机中形成。还进行了途径分析以分析在不同温度下的重要反应途径。结果表明，H-2 + HO2 [=] H + H2O2和O2 + NNH [=] N2 + HO2是氢HCCI燃烧和NO中最重要的反应。形成。使用已开发的化学动力学模型进行了HCCI燃烧的详细参数研究。通过在不同的相对空燃比（λ）下改变发动机转速（1000-3000 rpm），进气温度（380-460 K）和压缩比（16-18），在不同的发动机工况下进行数值模拟。确定了不同压缩比的HCCI工作范围，结果表明工作范围随压缩比的增加而扩大。研究了进气温度，发动机转速和当量比对气缸压力和放热率的影响。在所有测试条件下，观察到最大热效率为46％，最大燃烧效率为98％。还进行了NOx排放量的参数研究，发现NO排放量从较高的发动机负荷到较低的发动机负荷呈指数下降。 （C）2016 Elsevier Ltd.保留所有权利。

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