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首页> 外文期刊>American journal of applied sciences >Experimental and Skeletal Kinetic Model Study of Compressed Natural Gas Fueled Homogeneous Charge Compression Ignition Engine
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Experimental and Skeletal Kinetic Model Study of Compressed Natural Gas Fueled Homogeneous Charge Compression Ignition Engine

机译：压缩天然气均质充气压缩点火发动机的实验和骨架动力学模型研究

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Problem statement: In homogeneous charge compression ignition engines fuel oxidation chemistry determines the auto-ignition timing, heat release, reaction intermediates and the ultimate products of combustion. To shorten development time and to understand combustion processes, the use of simulation is increasing. Approach: A model that correctly simulates fuel oxidation at these conditions would be a useful design tool. Detailed models of hydrocarbon fuel oxidation, consisting of hundreds of chemical species and thousands of reactions. A way to lessen the burden was to use a skeletal reaction model, containing only tens of species and reactions. Results: The model was developed from the existing pre-ignition model, which had 10 species, 5 elementary reactions for kinetic and 6 elementary reactions for equilibrium and the standard k-ε turbulence model had been used in this investigation. This model combines the chemistry of the low, intermediate and high temperature regions. Conclusion: Simulations are compared with measured and calculated data from the engine operating at the following conditions: speed 1500 RPM, inlet temperature 363-433 K, fuel CNG and λ range 3-5. The simulations are generally in good agreement with the experimental data including temperature, pressure, combustion duration and heat release, and ignition delay
机译：问题陈述：在均质充量压缩式点火发动机中，燃料的氧化化学决定了自动点火的正时，放热，反应中间产物和最终的燃烧产物。为了缩短开发时间并了解燃烧过程，越来越多地使用模拟。方法：在这些条件下正确模拟燃料氧化的模型将是有用的设计工具。烃类燃料氧化的详细模型，包括数百种化学物质和数千种反应。减轻负担的一种方法是使用仅包含数十种物种和反应的骨骼反应模型。结果：该模型是在现有的点火前模型的基础上开发的，该模型有10种物质，其中5个用于动力学的基本反应和6个用于平衡的基本反应，并且在此研究中使用了标准k-ε湍流模型。该模型结合了低温，中温和高温区域的化学性质。结论：将模拟与在以下条件下运行的发动机的测量数据和计算数据进行了比较：转速1500 RPM，进气温度363-433 K，燃料CNG和λ范围3-5。模拟通常与包括温度，压力，燃烧持续时间和放热以及点火延迟的实验数据非常吻合

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